user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: on which continent is the usa located? 
Knowledge Triplets: United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245_pvqm
United States of America, location.statistical_region.places_exported_to, m.04xd0mv
United States of America, location.location.partially_contains, Milk River
North America, location.location.contains_major_portion_of, United States of America
United States of America, location.location.partially_containedby, North America
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfspzr
United States of America, location.location.partially_contains, Kettle River
United States of America, location.statistical_region.gdp_real, m.0hnzf7y
North America, base.locations.continents.planet, Earth
United States of America, location.statistical_region.places_imported_from, m.04bc95w
United States of America, location.statistical_region.gdp_real, m.0hnzf5j
United States of America, location.statistical_region.net_migration, g.1q5jj_y4t
United States of America, location.location.adjoin_s, m.02wtp98
United States of America, location.location.partially_contains, Good Neighbor Peak
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk83
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc3w9r4
United States of America, location.statistical_region.gdp_real, m.0hnzf3s
United States of America, location.statistical_region.places_exported_to, m.0493756
United States of America, location.location.partially_contains, Aroostook River
United States of America, location.location.partiallycontains, m.0wg9424
United States of America, location.statistical_region.gdp_real, g.1hhc3pjhs
United States of America, location.statistical_region.places_imported_from, m.049377b
United States of America, location.location.partially_contains, Cascade Range
United States of America, location.location.partiallycontains, m.0wg93yg
United States of America, location.statistical_region.places_exported_to, m.049375p
United States of America, location.statistical_region.gdp_real, m.0hnzf20
United States of America, location.location.partiallycontains, m.0zmcqfy
United States of America, location.statistical_region.gdp_real, g.1hhc4jxsk
United States of America, location.statistical_region.gdp_real, g.1hhc43hvy
United States of America, location.statistical_region.places_imported_from, m.0cl9ldp
United States of America, location.location.partiallycontains, m.0wg93zp
United States of America, location.statistical_region.gdp_real, g.1hhc4qq26
United States of America, location.statistical_region.places_imported_from, m.0dm4wc4
North America, location.location.partially_contains, United States of America
United States of America, location.location.partiallycontains, m.012m7xfc
United States of America, location.country.internet_tld, edu
United States of America, location.location.partially_contains, Frenchman River
United States of America, location.statistical_region.gdp_real, g.1hhc382fl
North America, location.location.partially_contains, United States, with Territories
United States of America, location.location.partially_contains, Pend Oreille River
United States of America, location.location.adjoin_s, m.02wtp91
United States of America, location.statistical_region.gdp_real, m.0hnzf6_
United States of America, location.statistical_region.places_imported_from, m.049374f
United States of America, location.location.partially_contains, Rocky Mountains
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1246120tm
United States of America, location.statistical_region.places_imported_from, m.04fxlft
United States of America, location.statistical_region.gdp_real, g.1hhc529b6
United States of America, location.location.partiallycontains, m.0wyfs3h
United States of America, location.statistical_region.major_exports, m.04g4s8w
North America, base.locations.continents.states_provinces_within, Montana
United States of America, location.statistical_region.gdp_real, g.1hhc4rrm3
United States of America, location.statistical_region.net_migration, g.1s06rbcfn
United States of America, location.statistical_region.gdp_real, m.0hnzf42
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsrq0
United States of America, location.statistical_region.places_exported_to, m.049379x
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc3xgn3
United States of America, location.statistical_region.gdp_real, g.1hhc4_s4z
United States of America, location.country.internet_tld, mil
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245zt6jc
United States of America, location.location.partiallycontains, m.0wg93xm
United States of America, location.statistical_region.gdp_real, g.1hhc4xfby
United States of America, location.location.partiallycontains, m.0wg93wf
United States of America, location.location.partially_contains, Tijuana River
United States of America, location.location.partially_contains, Skagit River
United States of America, location.statistical_region.gdp_real, m.0hnzf4z
United States of America, location.statistical_region.places_exported_to, m.049374x
United States of America, location.location.partiallycontains, m.012m7x7z
United States of America, location.statistical_region.gdp_real, g.11b60_8p9h
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245yxxn6
United States of America, location.statistical_region.gdp_real, m.0hnzf6d
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1s0604_gm
North America, base.locations.continents.countries_within, United States of America
United States of America, location.statistical_region.gdp_real, g.1hhc4b5jy
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk7w
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245ysqzh
United States of America, location.statistical_region.religions, m.03q1lwt
United States of America, location.location.partially_contains, New River
United States of America, location.statistical_region.places_imported_from, m.04fl3qp
United States of America, location.location.partially_contains, St. Clair River
United States of America, location.statistical_region.gdp_real, m.0hnzf62
United States of America, location.location.geolocation, m.046vxfq
United States of America, location.country.national_anthem, m.03k0799
United States of America, location.statistical_region.gdp_real, g.1hhc3pmt1
United States of America, location.statistical_region.gdp_real, g.1hhc4_rzv
United States of America, location.statistical_region.gdp_real, g.1hhc4wxfd
United States of America, location.location.partially_contains, Kootenay River
United States of America, location.statistical_region.gdp_real, g.1hhc47bf_
United States of America, location.location.partiallycontains, m.0wg93w8
United States of America, location.location.partiallycontains, m.0wg9400
United States of America, base.locations.continents.countries_within, North America
United States of America, location.country.administrative_divisions, Marshall Islands
United States of America, location.location.partiallycontains, m.0wg940v
United States of America, location.statistical_region.places_imported_from, m.0493774
United States of America, location.location.partiallycontains, m.0wg93_k
United States of America, location.statistical_region.gdp_real, g.1hhc40jz8
United States of America, location.statistical_region.places_imported_from, m.048_4q3
United States of America, location.statistical_region.places_exported_to, m.049374l
United States of America, location.statistical_region.places_imported_from, m.04bfg3x
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfspzh
United States of America, location.statistical_region.gdp_real, m.0hnzf5t
United States of America, location.location.adjoin_s, m.02wj9bp
United States of America, location.statistical_region.gdp_real, g.1hhc3mst8
United States of America, location.country.first_level_divisions, Washington, D.C.
United States of America, location.location.partially_contained_by, m.0wg99w2
United States of America, location.location.partiallycontains, m.012m7x6t
United States of America, location.location.partially_contains, Mount Cook
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245z4gk5
United States of America, location.statistical_region.places_exported_to, m.049373z
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245zsmt9
United States of America, location.statistical_region.places_imported_from, m.049374r
United States of America, location.statistical_region.gni_in_ppp_dollars, g.124606mmz
United States of America, location.statistical_region.gdp_real, m.0hnzf3h
United States of America, location.statistical_region.gni_in_ppp_dollars, g.124615wtd
United States of America, location.statistical_region.gdp_real, g.1hhc45tjy
United States of America, location.statistical_region.places_exported_to, m.04bccr9
United States of America, location.statistical_region.gdp_real, g.1hhc425w3
United States of America, location.statistical_region.gni_in_ppp_dollars, g.12460v89r
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk6w
United States of America, location.statistical_region.religions, m.03q1lvh
United States of America, location.location.partiallycontains, m.012m7x79
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc3y2ym
United States of America, location.statistical_region.places_imported_from, m.0493783
United States of America, location.statistical_region.gdp_real, m.0hnzf1d
United States of America, location.statistical_region.gdp_real, g.1hhc3cwgd
United States of America, location.location.partially_contains, Fortymile River
United States of America, location.statistical_region.net_migration, g.1s05y592g
United States of America, location.statistical_region.gdp_real, g.1hhc3zxqd
United States of America, location.location.partiallycontains, m.0wg93_q
Earth, base.locations.planets.continents_within, North America
United States of America, location.location.partiallycontains, m.0wp5grg
United States of America, location.location.partiallycontains, m.0wg93vr
United States of America, location.location.partiallycontains, m.0wg93v9
United States of America, location.statistical_region.gdp_real, g.1hhc4lns4
North America, base.locations.continents.states_provinces_within, Minnesota
North America, base.locations.continents.countries_within, Mexico
United States of America, location.location.partiallycontains, m.0wzh_k4
United States of America, location.statistical_region.gdp_real, m.0hnzf2l
United States of America, location.statistical_region.gdp_real, g.1hhc3z1m_
United States of America, location.statistical_region.major_exports, m.04g4s8q
United States of America, location.statistical_region.places_exported_to, m.049375c
United States of America, location.location.partiallycontains, m.0wg93tp
United States of America, location.location.partially_contains, St. Marys River
United States of America, location.country.administrative_divisions, Borinquen
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk8w
United States of America, location.statistical_region.places_imported_from, m.0493788
United States of America, location.country.internet_tld, gov
United States of America, location.statistical_region.places_exported_to, m.049377n
United States of America, location.statistical_region.major_imports, m.04g4sbb
United States of America, location.statistical_region.net_migration, g.1s0636sg5
United States of America, location.location.partially_contains, Saint Lawrence River
United States of America, location.location.partially_contains, Richelieu River
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc534c2
United States of America, location.location.partiallycontains, m.0wg93tv
United States of America, location.location.partiallycontains, m.0wjpmbd
United States of America, location.statistical_region.gdp_real, g.1hhc3y6cp
United States of America, location.location.partially_contains, Colorado River
United States of America, location.location.partiallycontains, m.0w_g5jc
United States of America, location.statistical_region.gdp_real, m.0hnzf57
United States of America, location.statistical_region.places_imported_from, m.0493751
United States of America, location.statistical_region.religions, m.03q1lw4
United States of America, location.statistical_region.places_imported_from, m.049377z
United States of America, location.statistical_region.gni_in_ppp_dollars, g.11b60_8p6_
United States of America, location.statistical_region.gdp_real, m.0hnzf13
United States of America, location.statistical_region.major_imports, m.04g4sbn
United States of America, location.statistical_region.places_imported_from, m.04c6sht
United States of America, location.location.partiallycontains, m.0wjpmrn
United States of America, location.location.partiallycontains, m.0wg9405
United States of America, location.location.partiallycontains, m.0wg93zv
United States of America, location.statistical_region.gdp_real, g.1hhc4c0dh
United States of America, location.statistical_region.gdp_real, g.1hhc3cc9l
United States of America, location.location.partially_contains, Pacific Coast Ranges
United States of America, location.statistical_region.places_exported_to, m.04938pv
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfspz7
United States of America, location.statistical_region.religions, m.0_hhjkj
United States of America, location.country.capital, Washington, D.C.
United States of America, location.location.partiallycontains, m.0wg9419
United States of America, location.statistical_region.gdp_real, g.1hhc4k307
United States of America, location.location.partiallycontains, m.0wg93x3
United States of America, location.statistical_region.gdp_real, g.1hhc41l1w
United States of America, location.location.partiallycontains, m.0wg9429
United States of America, location.location.partiallycontains, m.0wg942m
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk6m
United States of America, location.location.partially_contains, Missisquoi River
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.12tb6gb1z
Americas, location.location.contains, United States of America
United States of America, location.location.partially_contains, Saint John River
United States of America, location.location.partially_contains, Caribou Mountain
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc48tst
United States of America, location.location.partiallycontains, m.0wjpm7k
United States of America, location.statistical_region.religions, m.03q1lwc
United States of America, location.statistical_region.net_migration, g.1q5jj_vhm
United States, with Territories, location.location.partially_containedby, Pacific Ocean
United States of America, location.statistical_region.gdp_real, m.0hnzfb0
United States of America, location.location.partially_contains, Mount Saint Elias
United States of America, location.statistical_region.gdp_real, m.0hnzf78
United States of America, location.country.administrative_divisions, Johnston Atoll
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk8m
United States of America, location.location.partiallycontains, m.0wg93t_
United States of America, location.statistical_region.gdp_real, m.0hnzf91
United States of America, location.statistical_region.places_exported_to, m.04fl3np
United States of America, location.location.partially_contains, Saint Francis River
United States of America, location.location.partially_contains, Great Lakes
United States of America, base.locations.countries.planet, Earth
United States of America, location.location.partiallycontains, m.0wg93tj
United States of America, location.statistical_region.gdp_real, m.0hnzdxh
United States of America, location.location.partially_contains, Yukon River
United States of America, location.location.partially_contains, Boundary Peak
United States of America, location.statistical_region.places_imported_from, m.049378y
United States of America, location.statistical_region.gdp_real, g.1hhc4sh3r
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk93
United States of America, location.statistical_region.gdp_real, g.1hhc508df
United States of America, location.location.partiallycontains, m.0wg93z_
United States of America, location.statistical_region.places_imported_from, m.049377h
United States of America, location.location.partiallycontains, m.0wg93_w
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245_rq8d
United States of America, location.statistical_region.gdp_real, g.1hhc50x8k
United States of America, location.statistical_region.net_migration, g.1s0622grd
United States of America, location.location.partially_contains, Okanogan River
United States of America, location.location.partiallycontains, m.0wg942g
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc534gx
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc4001z
United States of America, location.location.partiallycontains, m.0wg9414
United States of America, location.location.primarily_containedby, North America
United States of America, location.statistical_region.net_migration, g.1q5jxqz89
United States of America, location.statistical_region.places_exported_to, m.04fhpj6
United States of America, location.location.containedby, United States, with Territories
United States of America, location.country.administrative_divisions, 19012
United States of America, location.statistical_region.gdp_real, g.1hhc4_rzt
United States of America, location.statistical_region.gdp_real, g.1hhc5269n
United States of America, location.statistical_region.gdp_real, g.1hhc39x2g
United States of America, location.statistical_region.places_exported_to, m.049375j
United States of America, location.statistical_region.gdp_real, g.1hhc488zp
United States of America, location.location.partially_containedby, Pacific Ocean
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.11b71tfphq
United States of America, location.location.partiallycontains, m.0wkfv0n
United States, with Territories, location.location.partially_containedby, North America
United States of America, location.location.partiallycontains, m.0wkwds_
United States of America, location.country.internet_tld, us
United States of America, location.location.containedby, Americas
United States of America, location.statistical_region.gdp_real, g.12tb6gh0h
United States of America, location.statistical_region.major_exports, m.04g4s8k
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc4tnvd
United States of America, location.statistical_region.places_exported_to, m.049375v
United States of America, location.statistical_region.gdp_real, m.0hnzff0
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc4tsbr
United States of America, location.statistical_region.gdp_real, g.1hhc3l230
United States of America, location.statistical_region.gdp_real, m.0hnzfd3
United States of America, location.statistical_region.places_exported_to, m.0493748
United States of America, location.location.partially_contains, Rio Grande
United States of America, location.statistical_region.gdp_real, g.1hhc3h35x
United States of America, location.statistical_region.trade_balance_as_percent_of_gdp, g.1hhc4cg5y
United States of America, location.country.administrative_divisions, Palmyra Atoll
United States of America, location.statistical_region.places_exported_to, m.049377t
United States of America, location.location.partially_contains, Stikine River
United States of America, base.locations.countries.continent, North America
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk73
United States of America, location.statistical_region.places_exported_to, m.0493792
United States of America, location.statistical_region.gdp_real, g.1hhc4vty0
United States of America, location.location.partially_contains, Roseau River
United States of America, location.statistical_region.gdp_real, g.1hhc3r2jh
United States of America, location.statistical_region.gdp_real, g.1hhc4rrtm
United States of America, location.statistical_region.gdp_real, g.1hhc38d2r
United States of America, location.statistical_region.gdp_real, m.0hnzf4d
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc40463
United States of America, location.location.partially_contains, Red River of the North
United States of America, location.location.partially_contains, Pembina River
United States of America, location.statistical_region.religions, m.03q1lwl
Americas, location.location.contains, North America
United States of America, location.location.partially_contains, Halls Stream
United States of America, location.statistical_region.gdp_real, g.1hhc4s1nr
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.11b71qnf7h
United States of America, location.location.partially_contains, White River
United States of America, location.location.partially_contains, Alsek River
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc474jl
United States of America, location.statistical_region.net_migration, g.1s065xpm5
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc4mhp2
United States of America, location.location.partiallycontains, m.0wg940h
United States of America, location.statistical_region.net_migration, g.1q5k9wh6h
United States of America, location.statistical_region.foreign_direct_investment_net_inflows, g.1hhc3jqkc
United States of America, location.statistical_region.gdp_real, g.1hhc469rm
United States of America, location.location.partially_contains, Boundary Butte
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc4vt_5
United States of America, location.statistical_region.gdp_real, g.1hhc54yf6
United States of America, location.statistical_region.places_imported_from, m.049373t
United States of America, location.location.partially_contained_by, m.0wg91ym
United States of America, location.statistical_region.gdp_real, m.0hnzf8s
United States of America, location.statistical_region.places_exported_to, m.04fxlgq
United States of America, location.statistical_region.places_imported_from, m.049376n
United States of America, location.location.partially_contains, Columbia River
United States of America, location.statistical_region.places_imported_from, m.049376v
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245_7lw1
United States of America, location.statistical_region.gdp_real, g.1hhc49n91
United States of America, location.location.partiallycontains, m.0wg942y
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245y_0gy
United States of America, location.statistical_region.gdp_real, g.1hhc4c0dj
United States of America, location.statistical_region.gdp_real, g.1hhc501r5
United States of America, location.location.adjoin_s, m.02sjtvg
United States of America, location.location.partiallycontains, m.0wg940n
United States of America, location.statistical_region.places_exported_to, m.0493797
United States of America, location.location.adjoin_s, m.02wtp8v
United States of America, location.statistical_region.gni_in_ppp_dollars, g.12tb6gb4c
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsk7m
United States of America, location.location.partially_contains, Similkameen River
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsrqj
United States of America, location.statistical_region.major_imports, m.04g4sbt
United States of America, location.statistical_region.gni_in_ppp_dollars, g.1245zlgw1
United States of America, location.location.partiallycontains, m.0wkc1gs
United States of America, location.location.partially_contains, Souris River
United States of America, location.statistical_region.gdp_real, m.0hnzf8h
United States of America, location.statistical_region.major_imports, m.04g4sbz
United States of America, location.location.partiallycontains, m.0wg93zj
United States of America, location.statistical_region.gdp_real, g.1hhc3mst7
United States of America, location.location.containedby, DVD Region 1
United States of America, location.statistical_region.gdp_real, g.1hhc4lzht
United States of America, location.statistical_region.gdp_real, g.1hhc3zxqc
United States of America, location.location.partiallycontains, m.0wg93_6
United States of America, location.location.partiallycontains, m.0wg93y9
United States of America, location.location.partiallycontains, m.0wg93y4
United States of America, location.statistical_region.religions, m.03q1lvy
United States of America, location.statistical_region.gdp_real, m.0hnzf86
North America, base.locations.continents.states_provinces_within, Wisconsin
United States of America, location.statistical_region.places_imported_from, m.049376_
United States of America, location.statistical_region.places_exported_to, m.049376h
United States of America, location.statistical_region.places_imported_from, m.0493743
United States of America, location.statistical_region.major_exports, m.04g4s90
United States of America, location.statistical_region.places_imported_from, m.04939hm
United States of America, location.location.partially_contains, Porcupine River
United States of America, location.location.partiallycontains, m.0wg940_
United States of America, location.location.partiallycontains, m.0wg941g
United States of America, location.statistical_region.gdp_real, m.0hnzf07
United States of America, location.statistical_region.net_migration, g.1q5k2q2ny
United States of America, location.statistical_region.gdp_real, m.0hnzf4p
United States of America, location.location.partiallycontains, m.0wg93zc
United States of America, location.location.partially_contains, Meduxnekeag River
United States of America, location.statistical_region.gdp_real, g.1hhc3l97v
United States of America, location.statistical_region.net_migration, g.1s064935v
North America, base.locations.continents.countries_within, Canada
United States of America, location.location.partiallycontains, m.0wg941m
United States of America, location.statistical_region.gni_in_ppp_dollars, m.0nfsrq8
United States of America, location.statistical_region.gdp_real, m.0hnzf6q
United States of America, location.statistical_region.trade_balance_as_percent_of_gdp, g.1hhc53smg
United States of America, location.statistical_region.religions, m.03q1lvq
United States of America, location.statistical_region.gdp_real, g.1hhc3jqd8
United States of America, location.location.partiallycontains, m.0wg940b
United States of America, location.location.partiallycontains, m.012m7x7k
United States of America, location.location.partiallycontains, m.0wg942s
United States of America, location.location.partiallycontains, m.0wkb2bj
United States of America, location.statistical_region.gender_balance_members_of_parliament, g.1hhc4x3d7
United States of America, location.location.partiallycontains, m.0wg93wl
United States of America, location.statistical_region.major_imports, m.04g4sb5
United States of America, location.statistical_region.gdp_real, m.0hnzf36

Answer: North America