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: gawler central railway line is included in which rail network? 
Knowledge Triplets: Gawler Central railway line, metropolitan_transit.transit_line.stops, Gawler Central railway station
Elizabeth railway station, location.location.geolocation, m.0cv94ml
Adelaide, location.location.contains, Dudley Park railway station
Adelaide, location.location.contains, Womma railway station
Adelaide, location.location.contains, Parafield railway station
Adelaide, location.location.contains, Smithfield railway station, Adelaide
Adelaide, location.location.contains, Gawler railway station
Elizabeth South railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Broadmeadows railway station, Adelaide, location.location.containedby, Adelaide
Munno Para railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Dudley Park railway station, location.location.containedby, Dudley Park, South Australia
Willunga railway line, rail.railway.part_of_network, TransAdelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Dry Creek railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Dudley Park railway station
Tambelin railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Elizabeth railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
North Adelaide railway station, location.location.containedby, Adelaide
Renown Park, location.location.contains, Ovingham railway station
Chidda railway station, location.location.geolocation, m.0cv94m0
Gawler Racecourse railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Dry Creek railway station, location.location.containedby, Dry Creek
m.0gwxgr1, dataworld.gardening_hint.last_referenced_by, Womma railway station
Dry Creek, location.location.contains, Dry Creek railway station
North Adelaide railway station, location.location.geolocation, m.02_tcdb
Salisbury railway station, Adelaide, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Evanston railway station, location.location.containedby, Adelaide
m.0gvqmhk, dataworld.gardening_hint.last_referenced_by, Dry Creek railway station
m.0gwwjf0, dataworld.gardening_hint.last_referenced_by, Tambelin railway station
Dudley Park, South Australia, location.location.contains, Dudley Park railway station
m.0gwwv9f, dataworld.gardening_hint.last_referenced_by, Salisbury railway station, Adelaide
Adelaide railway station, metropolitan_transit.transit_stop.terminus_for_lines, Gawler Central railway line
Adelaide railway station, location.location.containedby, Adelaide
m.0gvpf2v, dataworld.gardening_hint.last_referenced_by, Elizabeth railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Evanston railway station
Seaford railway line, rail.railway.part_of_network, TransAdelaide
Islington railway station, location.location.geolocation, m.02_tbs5
Smithfield railway station, Adelaide, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Gawler Central railway line, rail.railway.part_of_network, TransAdelaide
Adelaide, location.location.contains, Ovingham railway station
Mawson Interchange, location.location.geolocation, m.02_v0d9
Gawler Central railway line, metropolitan_transit.transit_line.stops, Broadmeadows railway station, Adelaide
Evanston railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Elizabeth South railway station, location.location.containedby, Adelaide
North Adelaide railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Adelaide, location.location.contains, Mawson Interchange
Parafield Gardens railway station, location.location.geolocation, m.02_tbt1
Adelaide, location.location.contains, Gawler Racecourse railway station
TransAdelaide, rail.rail_network.railways, Grange railway line
TransAdelaide, rail.rail_network.railways, Penfield railway line
m.0gwxjyq, type.object.permission, m.019h
Gawler Central railway line, metropolitan_transit.transit_line.stops, Elizabeth railway station
Gawler Oval railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Mawson Interchange, location.location.containedby, Adelaide
Adelaide, location.location.contains, Evanston railway station
Gawler Racecourse railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
m.0r86n2f, dataworld.gardening_hint.last_referenced_by, Adelaide railway station
Greenfields railway station, location.location.containedby, Adelaide
TransAdelaide, rail.rail_network.railways, Tonsley railway line
Smithfield railway station, Adelaide, location.location.containedby, Adelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Gawler Oval railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Gawler railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Salisbury railway station, Adelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Chidda railway station
North Adelaide, location.location.contains, North Adelaide railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Mawson Interchange
Smithfield railway station, Adelaide, location.location.geolocation, m.0cv94n4
Outer Harbor railway line, metropolitan_transit.transit_line.stops, Adelaide railway station
Gawler Oval railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Islington railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Kudla railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Dudley Park railway station, location.location.geolocation, m.02_tbrz
Greenfields railway station, location.location.geolocation, m.02_tbsv
Parafield railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Kilburn railway station, Adelaide, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Adelaide, location.location.contains, Broadmeadows railway station, Adelaide
m.0gvpdgs, dataworld.gardening_hint.last_referenced_by, North Adelaide railway station
m.0gvpg24, dataworld.gardening_hint.last_referenced_by, Evanston railway station
Parafield Gardens railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Kilburn railway station, Adelaide, location.location.geolocation, m.02_tbsd
Adelaide, location.location.contains, Adelaide railway station
Parafield railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Parafield Gardens, location.location.contains, Greenfields railway station
m.0gvq7f3, dataworld.gardening_hint.last_referenced_by, Chidda railway station
Adelaide, location.location.contains, Tambelin railway station
m.0gvpm6z, dataworld.gardening_hint.last_referenced_by, Gawler Racecourse railway station
m.0gvqpwj, dataworld.gardening_hint.last_referenced_by, Dudley Park railway station
Outer Harbor railway line, rail.railway.part_of_network, TransAdelaide
TransAdelaide, rail.rail_network.railways, Seaford railway line
Dudley Park railway station, location.location.containedby, Prospect
Adelaide, location.location.contains, Gawler Central railway station
Adelaide, location.location.contains, Kilburn railway station, Adelaide
Gawler Central railway line, metropolitan_transit.transit_line.terminuses, Gawler Central railway station
Womma railway station, location.location.containedby, Adelaide
Gawler Central railway station, metropolitan_transit.transit_stop.terminus_for_lines, Gawler Central railway line
Ovingham railway station, location.location.containedby, Renown Park
Munno Para railway station, location.location.containedby, Adelaide
m.0gvpt7d, dataworld.gardening_hint.last_referenced_by, Nurlutta railway station
Kilburn railway station, Adelaide, location.location.containedby, Kilburn
Gawler Central railway line, metropolitan_transit.transit_line.stops, Parafield Gardens railway station
Elizabeth South railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
TransAdelaide, rail.rail_network.railways, Outer Harbor railway line
Northfield railway line, rail.railway.part_of_network, TransAdelaide
m.0gwxylf, dataworld.gardening_hint.last_referenced_by, Mawson Interchange
Tambelin railway station, location.location.geolocation, m.0cv94nj
Ovingham railway station, location.location.geolocation, m.02_tbrr
Henley Beach railway line, rail.railway.part_of_network, TransAdelaide
Dudley Park railway station, location.location.containedby, Adelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Kilburn railway station, Adelaide
Gawler Racecourse railway station, location.location.containedby, Adelaide
m.0gvq6ck, dataworld.gardening_hint.last_referenced_by, Parafield railway station
Salisbury railway station, Adelaide, location.location.geolocation, m.0wmmfxd
South Australia, location.location.contains, Kudla railway station
m.0gvq105, dataworld.gardening_hint.last_referenced_by, Ovingham railway station
Public transport, business.industry.companies, TransAdelaide
Elizabeth South railway station, location.location.geolocation, m.0cv94md
m.0gwy44p, dataworld.gardening_hint.last_referenced_by, Gawler railway station
Prospect, location.location.contains, Dudley Park railway station
Tambelin railway station, location.location.containedby, Adelaide
Ovingham railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Adelaide, location.location.contains, Gawler Oval railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Gawler Racecourse railway station
Adelaide, location.location.contains, Salisbury railway station, Adelaide
Ovingham railway station, location.location.containedby, Adelaide
Gawler Central railway station, location.location.geolocation, m.0cv94pg
m.0gvq10d, dataworld.gardening_hint.last_referenced_by, Munno Para railway station
Adelaide, location.location.contains, Elizabeth South railway station
Chidda railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Gawler railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
South Australia, location.location.contains, Parafield Gardens railway station
Salisbury railway station, Adelaide, location.location.containedby, Salisbury
Kilburn railway station, Adelaide, location.location.containedby, Adelaide
TransAdelaide, organization.organization.headquarters, m.062tp3r
Adelaide railway station, rail.railway_terminus.railways_terminating_here, Outer Harbor railway line
TransAdelaide, rail.rail_network.railways, Willunga railway line
Northfield railway line, metropolitan_transit.transit_line.stops, Dry Creek railway station
Kudla railway station, location.location.containedby, South Australia
Dry Creek railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Gawler Central railway line, metropolitan_transit.transit_line.stops, Nurlutta railway station
Broadmeadows railway station, Adelaide, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
m.0gvp6hd, dataworld.gardening_hint.last_referenced_by, Gawler Oval railway station
Munno Para railway station, location.location.geolocation, m.0cv94nb
Dry Creek railway station, location.location.containedby, Adelaide
Adelaide railway station, location.location.geolocation, m.02_qsh_
Adelaide, location.location.contains, Greenfields railway station
Adelaide, location.location.contains, Dry Creek railway station
Semaphore railway line, rail.railway.part_of_network, TransAdelaide
TransAdelaide, rail.rail_network.railways, Belair railway line
North Adelaide railway station, location.location.containedby, North Adelaide
TransAdelaide, rail.rail_network.railways, Gawler Central railway line
Mawson Interchange, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Tonsley railway line, rail.railway.part_of_network, TransAdelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Munno Para railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Womma railway station
Grange railway line, rail.railway.part_of_network, TransAdelaide
Gawler Central railway line, metropolitan_transit.transit_line.terminuses, Adelaide railway station
Dudley Park railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Adelaide, location.location.contains, Elizabeth railway station
Womma railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Broadmeadows railway station, Adelaide, location.location.geolocation, m.0cv94mz
Outer Harbor railway line, rail.railway.terminuses, Adelaide railway station
Evanston railway station, location.location.geolocation, m.0cv94nq
Nurlutta railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
TransAdelaide, rail.rail_network.railways, Henley Beach railway line
Ovingham railway station, location.location.containedby, Ovingham
m.0gwxjyq, dataworld.gardening_hint.last_referenced_by, Gawler Central railway line
Broadmeadows railway station, Adelaide, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Adelaide railway station, metropolitan_transit.transit_stop.terminus_for_lines, Seaford railway line
Elizabeth railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
m.0gvqgqq, dataworld.gardening_hint.last_referenced_by, Elizabeth South railway station
Tambelin railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Gawler Central railway line, metropolitan_transit.transit_line.stops, Kudla railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Ovingham railway station
Adelaide, location.location.contains, Islington railway station
m.0gvpl3b, dataworld.gardening_hint.last_referenced_by, Greenfields railway station
TransAdelaide, rail.rail_network.railways, Northfield railway line
Belair railway line, rail.railway.part_of_network, TransAdelaide
Gawler Central railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Gawler railway station, location.location.geolocation, m.0cv94p2
m.0gvphch, dataworld.gardening_hint.last_referenced_by, Gawler Central railway station
Adelaide, location.location.contains, Chidda railway station
Adelaide railway station, metropolitan_transit.transit_stop.transit_lines, Outer Harbor railway line
Salisbury railway station, Adelaide, location.location.containedby, Adelaide
TransAdelaide, business.business_operation.industry, Public transport
Adelaide, location.location.contains, Munno Para railway station
Islington railway station, location.location.containedby, Adelaide
Gawler Racecourse railway station, location.location.geolocation, m.0cv94nx
Kudla railway station, location.australian_suburb.postal_code, 5115
Gawler Central railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Kilburn, location.location.contains, Kilburn railway station, Adelaide
TransAdelaide, rail.railway_operator.railways, m.05yrjyz
Chidda railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
TransAdelaide, rail.rail_network.railways, Semaphore railway line
Greenfields railway station, metropolitan_transit.transit_stop.transit_lines, Gawler Central railway line
Gawler Central railway line, metropolitan_transit.transit_line.stops, North Adelaide railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Elizabeth South railway station
Dry Creek railway station, metropolitan_transit.transit_stop.transit_lines, Northfield railway line
Parafield Gardens railway station, location.location.containedby, South Australia
Adelaide railway station, location.location.containedby, Australia
Gawler Central railway line, metropolitan_transit.transit_line.stops, Islington railway station
Ovingham, location.location.contains, Ovingham railway station
Parafield railway station, location.location.geolocation, m.0cv94lr
TransAdelaide, organization.organization.date_founded, 1994-07
Outer Harbor railway line, metropolitan_transit.transit_line.terminuses, Adelaide railway station
m.019h, type.permission.controls, m.0gwxjyq
Nurlutta railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Elizabeth railway station, location.location.containedby, Adelaide
Mawson Interchange, location.location.containedby, Mawson Lakes
Womma railway station, location.location.geolocation, m.0cv94ms
Adelaide, location.location.contains, Nurlutta railway station
Munno Para railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Gawler railway station, location.location.containedby, Adelaide
Kudla railway station, location.location.geolocation, m.02_dmrk
Gawler Central railway line, metropolitan_transit.transit_line.stops, Tambelin railway station
Salisbury railway station, Adelaide, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Gawler Central railway station, location.location.containedby, Adelaide
Womma railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
m.05yrjyz, rail.railway_operator_relationship.operator, TransAdelaide
Penfield railway line, rail.railway.part_of_network, TransAdelaide
Adelaide railway station, metropolitan_transit.transit_stop.terminus_for_lines, Outer Harbor railway line
Nurlutta railway station, location.location.geolocation, m.0cv94m6
Gawler Oval railway station, location.location.containedby, Adelaide
Gawler Central railway line, metropolitan_transit.transit_line.stops, Greenfields railway station
Greenfields railway station, location.location.containedby, Parafield Gardens
Gawler railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Australia, location.location.contains, Adelaide railway station
Seaford railway line, metropolitan_transit.transit_line.terminuses, Adelaide railway station
Evanston railway station, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Nurlutta railway station, location.location.containedby, Adelaide
Dry Creek railway station, location.location.geolocation, m.02_tbsm
Gawler Central railway line, metropolitan_transit.transit_line.stops, Smithfield railway station, Adelaide
Salisbury, location.location.contains, Salisbury railway station, Adelaide
Adelaide, location.location.contains, North Adelaide railway station
m.0gvpx1j, dataworld.gardening_hint.last_referenced_by, Parafield Gardens railway station
Gawler Central railway line, metropolitan_transit.transit_line.stops, Parafield railway station
Smithfield railway station, Adelaide, user.maxim75.default_domain.dbpedia_import.geocode_checked, 2010-07-25
Parafield railway station, location.location.containedby, Adelaide
m.0gvp8r2, dataworld.gardening_hint.last_referenced_by, Islington railway station
Chidda railway station, location.location.containedby, Adelaide
Gawler Oval railway station, location.location.geolocation, m.0cv94p8
Mawson Lakes, location.location.contains, Mawson Interchange

Answer: TransAdelaide