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: when was the last time iran invaded another country? 
Knowledge Triplets: Tehran International Conference on Disarmament and Non-Proliferation, 2010, time.event.end_date, 2010-04-18
g.11b7gthhns, film.film.country, Iran
g.12qhk7m87, film.film.country, Iran
g.12qhkcp77, film.film.country, Iran
g.12qhk8lh5, film.film.country, Iran
g.12qhkgtd2, film.film.country, Iran
g.12qhk9c44, film.film.country, Iran
g.120wr8q_, film.film.country, Iran
g.11b7hsgwrv, film.film.country, Iran
g.12qhl3f8d, film.film.country, Iran
g.12qhkv919, film.film.country, Iran
Iran, location.location.events, Iran crisis of 1946
The Persian revolution of 1905-1909, book.written_work.subjects, Iran
g.12qhl3f8h, film.film.country, Iran
g.11b5m1rpq7, film.film.country, Iran
g.12qhl3121, film.film.country, Iran
g.12qhky4q0, film.film.country, Iran
g.12qhkys1_, film.film.country, Iran
g.12qhk9c41, film.film.country, Iran
g.12qhkpm9_, film.film.country, Iran
g.12qhkyz7b, film.film.country, Iran
g.12qhkyc83, film.film.country, Iran
g.12qhl2w3_, film.film.country, Iran
g.12qhl2nl3, film.film.country, Iran
g.12qhk8d3h, film.film.country, Iran
g.12tb7zrmb, film.film.country, Iran
g.11b7qvvfkf, film.film.country, Iran
g.12qhl3f84, film.film.country, Iran
g.122qxxhw, film.film.country, Iran
g.12qhky4q8, film.film.country, Iran
g.12qhkkk89, film.film.country, Iran
g.12qhk8d32, film.film.country, Iran
g.12qhk9c46, film.film.country, Iran
g.121n9dzd, film.film.country, Iran
Iran, location.location.events, Anglo-Soviet invasion of Iran
Thirteen 59, film.film.country, Iran
g.12qhkdv81, film.film.country, Iran
The Last Tourist in Iran, common.topic.notable_types, Book
g.12qhkgtd3, film.film.country, Iran
m.011sm3gf, film.film.country, Iran
g.12qhkys20, film.film.country, Iran
g.12qhkys24, film.film.country, Iran
g.12qhl2g89, film.film.country, Iran
g.11b768zd2g, film.film.country, Iran
g.12qhkrrc8, film.film.country, Iran
The Report, film.film.country, Iran
g.1230_52b, film.film.country, Iran
g.11b76by6mn, film.film.country, Iran
g.12qhkv2t8, film.film.country, Iran
g.12qhkfd17, film.film.country, Iran
g.12qhknng7, film.film.country, Iran
g.12qhk868h, film.film.country, Iran
g.11b6r9729d, film.film.country, Iran
g.12qhk7m8b, film.film.country, Iran
g.12qhkr575, film.film.country, Iran
m.0z41735, film.film.country, Iran
g.12qhk868c, film.film.country, Iran
m.011xd66c, film.film.country, Iran
g.11b77spy4p, film.film.country, Iran
g.12qhl3f86, film.film.country, Iran
g.12qhkyz76, film.film.country, Iran
g.12qhkly82, film.film.country, Iran
g.12qhl311m, film.film.country, Iran
Iranian Revolution, time.event.end_date, 1979-02
g.1235kn8w, film.film.country, Iran
g.12qhkys23, film.film.country, Iran
g.12qhk8018, film.film.country, Iran
g.12qhl3f88, film.film.country, Iran
Another Morning, film.film.country, Iran
g.122rd4k6, film.film.country, Iran
g.12qhkyc84, film.film.country, Iran
g.11b76f0115, film.film.country, Iran
Final Whistle, film.film.country, Iran
g.12qhk868d, film.film.country, Iran
g.12qhkr573, film.film.country, Iran
g.12qhkfd14, film.film.country, Iran
g.12qhkdv7_, film.film.country, Iran
Anglo-Soviet invasion of Iran, common.topic.notable_types, Military Conflict
g.1234t788, film.film.country, Iran
g.12qhkgtd7, film.film.country, Iran
g.12qhkn7q9, film.film.country, Iran
g.12qhkljn6, film.film.country, Iran
g.12qhkb972, film.film.country, Iran
Persian Campaign, time.event.end_date, 1918-10-30
g.12372gyy, film.film.country, Iran
g.12qhk7fd8, film.film.country, Iran
g.12qhkgtd9, film.film.country, Iran
g.122fjm13, film.film.country, Iran
The Last Tourist in Iran, book.book.editions, The Last Tourist in Iran
g.11b6t7j26f, film.film.country, Iran
The Last Winter, film.film.country, Iran
g.12bfg3q19, film.film.country, Iran
g.12qhl04y4, film.film.country, Iran
g.12qhk7m84, film.film.country, Iran
Mongol invasion of Khwarezmia and Eastern Iran, time.event.locations, Iran
g.12qhkmhn7, film.film.country, Iran
g.12qhl2w42, film.film.country, Iran
Last Theft, film.film.country, Iran
g.12qhk8lgr, film.film.country, Iran
1953 Iranian coup d'état, common.topic.notable_types, Military Conflict
g.12qhk7fd5, film.film.country, Iran
1953 Iranian coup d'état, time.event.end_date, 1953
g.121lmq6f, film.film.country, Iran
Kurdish separatism in Iran, time.event.includes_event, Iran crisis of 1946
g.12qhk8d36, film.film.country, Iran
g.12qhl2g87, film.film.country, Iran
g.12qhl0yp7, film.film.country, Iran
g.12qhkq021, film.film.country, Iran
g.121xql71, film.film.country, Iran
g.12qhkb97m, film.film.country, Iran
g.12qhkths4, film.film.country, Iran
g.11h1t4kr0, film.film.country, Iran
g.12qhkptn1, film.film.country, Iran
g.12qhkdv80, film.film.country, Iran
g.12qhl2w3y, film.film.country, Iran
g.1215plb0, film.film.country, Iran
g.12qhkc80_, film.film.country, Iran
g.12qhkcw15, film.film.country, Iran
g.12qhk9y00, film.film.country, Iran
g.12qhkyky1, film.film.country, Iran
g.12qhkw0n8, film.film.country, Iran
Iran, olympics.olympic_participating_country.olympics_participated_in, 1952 Summer Olympics
g.1226m17z, film.film.country, Iran
g.12qhkljn5, film.film.country, Iran
g.12qhl311r, film.film.country, Iran
g.12qhk7m8n, film.film.country, Iran
g.12qhky4q1, film.film.country, Iran
g.1213vcr7, film.film.country, Iran
g.121n9360, film.film.country, Iran
The Last Tourist in Iran, book.written_work.subjects, Iran
g.12qhkd1t8, film.film.country, Iran
Farewell, Lady, film.film.country, Iran
g.12qhks479, film.film.country, Iran
g.12qhkths5, film.film.country, Iran
g.12qhkb973, film.film.country, Iran
g.12qhkkk8_, film.film.country, Iran
g.12qhk7fd9, film.film.country, Iran
g.12qhkkk87, film.film.country, Iran
m.011x1s13, film.film.country, Iran
g.12qhkr57f, film.film.country, Iran
g.12qhks474, film.film.country, Iran
g.12qhkcw14, film.film.country, Iran
g.12qhkljn4, film.film.country, Iran
11'09"01 September 11, film.film.country, Iran
g.12qhkly7y, film.film.country, Iran
g.12qhk9c3_, film.film.country, Iran
g.121j1xz6, film.film.country, Iran
g.12qhl3f85, film.film.country, Iran
g.12qhk9y01, film.film.country, Iran
g.12qhklyn8, film.film.country, Iran
g.121_59tk, film.film.country, Iran
g.11bc780c42, film.film.country, Iran
g.12240z7k, film.film.country, Iran
The Last Station, film.film.country, Iran
Iran crisis of 1946, time.event.locations, Iran
g.12qhkvnl7, film.film.country, Iran
g.12qhkrrc1, film.film.country, Iran
g.12qhkyz79, film.film.country, Iran
g.11h1t2605, film.film.country, Iran
m.011x1s21, film.film.country, Iran
m.0bgbgtv, military.force_strength.date, 1988
g.12qhkdv87, film.film.country, Iran
g.12qhktxs7, film.film.country, Iran
1953 Iranian coup d'état, time.event.locations, Iran
g.12qhk8d33, film.film.country, Iran
g.12qhk868w, film.film.country, Iran
g.12qhk7m8w, film.film.country, Iran
g.12qhk7m8m, film.film.country, Iran
g.12qhl1xl7, film.film.country, Iran
Iran crisis of 1946, common.topic.notable_types, Military Conflict
g.1hc0gm980, film.film.country, Iran
Mongol invasion of Khwarezmia and Eastern Iran, common.topic.notable_types, Military Conflict
Muslim conquest of Persia, time.event.end_date, 0656
g.11b6j87q7p, film.film.country, Iran
g.12qhks473, film.film.country, Iran
g.12qhk8zc7, film.film.country, Iran
g.12qhl22m1, film.film.country, Iran
m.011zhfvt, film.film.country, Iran
g.1269np9lm, film.film.country, Iran
Maybe Another Time, film.film.country, Iran
g.12qhks472, film.film.country, Iran
g.12qhk94h_, film.film.country, Iran
g.11dy699y4, film.film.country, Iran
g.1213ts8q, film.film.country, Iran
g.12qhks475, film.film.country, Iran
Regime Change in Iran, book.book.editions, Regime change in Iran : overthrow of Premier Mossadeq of Iran, November 1952-August 1953
g.12qhkb970, film.film.country, Iran
g.15dqb8tw, film.film.country, Iran
Iran, book.book_subject.works, The Persian revolution of 1905-1909
g.12qhkr576, film.film.country, Iran
One Hundred Days, film.film.country, Iran
g.1203lw28r, film.film.country, Iran
g.120ldj8m, film.film.country, Iran
g.12214r52j, film.film.country, Iran
g.12qhkdn59, film.film.country, Iran
g.1232361rg, film.film.country, Iran
g.12qhkdv83, film.film.country, Iran
g.121v84dl, film.film.country, Iran
g.12qhkyz72, film.film.country, Iran
g.12qhl04y2, film.film.country, Iran
The Last Days of Winter, film.film.country, Iran
Muslim conquest of Persia, time.event.locations, Iran
The Last Migration, film.film.country, Iran
g.12qhkhsm1, film.film.country, Iran
m.011x8w96, film.film.country, Iran
g.12qhkn7q5, film.film.country, Iran
g.12qhk7m8h, film.film.country, Iran
g.12qhl2nl7, film.film.country, Iran
g.12qhk8d31, film.film.country, Iran
g.12qhkzz5_, film.film.country, Iran
g.12qhl3124, film.film.country, Iran
g.12qhkt3g7, film.film.country, Iran
g.12qhkcw18, film.film.country, Iran
g.12qhk8017, film.film.country, Iran
g.12qhk9k8_, film.film.country, Iran
g.12qhkhsm5, film.film.country, Iran
g.12qhktxs8, film.film.country, Iran
g.12qhkkz14, film.film.country, Iran
g.12qhkh5l1, film.film.country, Iran
g.15dpmy2j, film.film.country, Iran
g.12qhk9k81, film.film.country, Iran
g.122y5dl6, film.film.country, Iran
g.12qhkly80, film.film.country, Iran
g.11b6d4x1k7, film.film.country, Iran
g.11b708jw8s, film.film.country, Iran
g.122dl2dn, film.film.country, Iran
g.12qhl2g82, film.film.country, Iran
g.12qhl22m2, film.film.country, Iran
g.12qhl36y6, film.film.country, Iran
Russo-Persian War, time.event.end_date, 1828
g.12qhky4q4, film.film.country, Iran
g.12qhkl4m5, film.film.country, Iran
g.12qhkhsm3, film.film.country, Iran
g.12qhk7fd3, film.film.country, Iran
g.112yfn3hm, film.film.country, Iran
The Last Supper, film.film.country, Iran
g.12qhk9c49, film.film.country, Iran
g.11b72f6hw7, film.film.country, Iran
g.12qhkc81d, film.film.country, Iran
A Few Days Later, film.film.country, Iran
g.12qhkd1t1, film.film.country, Iran
g.122k62q6, film.film.country, Iran
A Little Farther, film.film.country, Iran
g.12qhl04y6, film.film.country, Iran
g.1230v8m8, film.film.country, Iran
g.12qhkly81, film.film.country, Iran
g.12qhl04y3, film.film.country, Iran
Persian Expedition of 1796, time.event.locations, Iran
g.12qhkzz67, film.film.country, Iran
g.121lyslh, film.film.country, Iran
g.12qhkkk91, film.film.country, Iran
g.12qhkrrc4, film.film.country, Iran
g.12qhkhsm4, film.film.country, Iran
g.12qhkkz16, film.film.country, Iran
g.12qhk8019, film.film.country, Iran
Iran, location.location.events, 1921 Persian coup d'état
g.12qhk7m8q, film.film.country, Iran
m.0y43yn8, film.film.country, Iran
m.0z4187t, film.film.country, Iran
Maybe Soon. Maybe Never, film.film.country, Iran
g.119pgt546, film.film.country, Iran
g.12qhk868q, film.film.country, Iran
g.12qhky4q6, film.film.country, Iran
g.12qhkhlh8, film.film.country, Iran
g.12215djb, film.film.country, Iran
g.12qhk9y03, film.film.country, Iran
g.11bc84ydhb, film.film.country, Iran
40 years old, film.film.country, Iran
g.122l88lr, film.film.country, Iran
Another Day, film.film.country, Iran
g.11b6tfb8_3, film.film.country, Iran
g.11b768zqd3, film.film.country, Iran
g.12qhkys22, film.film.country, Iran
g.12qhkd1t6, film.film.country, Iran
Anglo-Soviet invasion of Iran, time.event.locations, Iran
1921 Persian coup d'état, time.event.locations, Iran
g.12qhl22m4, film.film.country, Iran
g.12qhk8d35, film.film.country, Iran
g.12qhkptn7, film.film.country, Iran
g.12qhkths6, film.film.country, Iran
g.1pz2tnr28, film.film.country, Iran
g.11b6ddn490, film.film.country, Iran
g.12qhl2g88, film.film.country, Iran
g.12qhkyky3, film.film.country, Iran
316, film.film.country, Iran
g.12qhkys25, film.film.country, Iran
g.122yyhw6, film.film.country, Iran
g.12qhkd1t3, film.film.country, Iran
g.1q648r5qq, film.film.country, Iran
g.12qhkpm9m, film.film.country, Iran
g.12qhk94j8, film.film.country, Iran
g.1hc0gw178, film.film.country, Iran
g.11b6tw9y28, film.film.country, Iran
g.12qhkmw56, film.film.country, Iran
g.12qhkbwm8, film.film.country, Iran
g.11b62z7hw3, film.film.country, Iran
g.12qhkfl8_, film.film.country, Iran
Anglo-Persian War, time.event.end_date, 1857-04-04
g.12qhklyn7, film.film.country, Iran
g.12qhkr56_, film.film.country, Iran
g.12qhk_52d, film.film.country, Iran
g.12qhkptn9, film.film.country, Iran
g.121b1zhd, film.film.country, Iran
g.12qhkvnl8, film.film.country, Iran
Tehran: Another Side, film.film.country, Iran
g.12qhk8lh7, film.film.country, Iran
g.12qhk8d37, film.film.country, Iran
g.122tcmyr, film.film.country, Iran
Only Image Remains, film.film.country, Iran
g.12qhkrrc2, film.film.country, Iran
g.12qhk8d3c, film.film.country, Iran
g.12qhkb974, film.film.country, Iran
g.12hhgw849, film.film.country, Iran
Iran, military.military_combatant.force_deployments, m.0bgbgtv
g.12qhky4q7, film.film.country, Iran
Our Times, film.film.country, Iran
End, film.film.country, Iran
g.12qhkdv88, film.film.country, Iran
m.0_01b2f, film.film.country, Iran
Anglo-Soviet invasion of Iran, time.event.end_date, 1941-09-17
g.12qhkdv82, film.film.country, Iran
g.12qhk9k88, film.film.country, Iran
g.12qhk9c47, film.film.country, Iran
g.12qhk8d3r, film.film.country, Iran
g.12qhkths1, film.film.country, Iran
g.12qhk9k8m, film.film.country, Iran
g.12qhkyc85, film.film.country, Iran
Iran–Iraq War, time.event.locations, Iraq
g.12qhkh5l3, film.film.country, Iran
g.12qhk9c45, film.film.country, Iran
g.12qhkr57d, film.film.country, Iran
g.12qhkrrc5, film.film.country, Iran
g.12qhkd1t5, film.film.country, Iran
g.12qhl2g84, film.film.country, Iran
g.12qhkmw53, film.film.country, Iran
g.12qhl22m5, film.film.country, Iran
Iran, location.location.events, Mongol invasion of Khwarezmia and Eastern Iran
g.12qhkr578, film.film.country, Iran
The Photo, film.film.country, Iran
g.119pg23yr, film.film.country, Iran
One More Day, film.film.country, Iran
Mongol invasion of Khwarezmia and Eastern Iran, time.event.end_date, 1221
Apparition, film.film.country, Iran
g.12qhk7m8c, film.film.country, Iran
g.12qhkhsm6, film.film.country, Iran
g.12qhl04y5, film.film.country, Iran
g.12qhkh5l4, film.film.country, Iran
g.122sg0p7, film.film.country, Iran
g.12qhkly7h, film.film.country, Iran
g.1211qb6b, film.film.country, Iran
g.1229bn01, film.film.country, Iran
g.11b66h7d9z, film.film.country, Iran
Anglo-Persian War, time.event.locations, Iran
g.12qhkths3, film.film.country, Iran
Iran–PJAK conflict, time.event.end_date, 2011-09-29
Iran, location.location.events, 1953 Iranian coup d'état
g.1229cw1s, film.film.country, Iran
The Last Word, film.film.country, Iran
g.12qhl3122, film.film.country, Iran
g.12qhkkym8, film.film.country, Iran
g.12qhkrc3_, film.film.country, Iran
g.12qhk7m86, film.film.country, Iran
g.1229d4mx, film.film.country, Iran
m.0yqp5m7, film.film.country, Iran
g.12qhl0yp8, film.film.country, Iran
g.122qyhyz, film.film.country, Iran
g.12z655_95, film.film.country, Iran
g.12qhkljn2, film.film.country, Iran
g.12qhkgtd1, film.film.country, Iran
Goodbye Life, film.film.country, Iran
g.122g8qkz, film.film.country, Iran
g.122y5dlh, film.film.country, Iran
Iran, book.book_subject.works, The Last Tourist in Iran
From No. 37, film.film.country, Iran
g.122r2q28, film.film.country, Iran
g.12qhkxkt8, film.film.country, Iran
After 15 Years, film.film.country, Iran
g.12qhkc1n7, film.film.country, Iran
g.1224bqt2, film.film.country, Iran
g.11dy683yd, film.film.country, Iran
g.12qhk9y04, film.film.country, Iran
g.12qhkyc87, film.film.country, Iran
g.11bc71hwfy, film.film.country, Iran
g.12qhks478, film.film.country, Iran
g.12qhk8d3n, film.film.country, Iran
g.122qytnp, film.film.country, Iran
g.12qhk8lh4, film.film.country, Iran
g.12qhkkk88, film.film.country, Iran
g.121pw4n4, film.film.country, Iran
g.12qhl2nl4, film.film.country, Iran
g.1231gfc8, film.film.country, Iran
g.12qhkp717, film.film.country, Iran
g.12qhkptn8, film.film.country, Iran
Bam 6.6, film.film.country, Iran
g.12qhkr56y, film.film.country, Iran
g.12qhl3f81, film.film.country, Iran
g.12qhk868m, film.film.country, Iran
g.12qhkfl97, film.film.country, Iran
Iran crisis of 1946, time.event.included_in_event, Kurdish separatism in Iran
g.12qhktq4_, film.film.country, Iran
g.12qhkly7s, film.film.country, Iran
g.12qhl3f80, film.film.country, Iran
m.0z41bj5, film.film.country, Iran
g.12qhkd1t4, film.film.country, Iran
g.120w8bb5, film.film.country, Iran
g.12qhk7m8s, film.film.country, Iran
g.12qhkyc7_, film.film.country, Iran
g.12qhkrc41, film.film.country, Iran
g.122sgbfh, film.film.country, Iran
g.12214jv7f, film.film.country, Iran
g.12qhkdv89, film.film.country, Iran
g.12qhkl4m1, film.film.country, Iran
g.1231977r, film.film.country, Iran
g.12qhkhsm7, film.film.country, Iran
g.12qhkm9m_, film.film.country, Iran
g.12qhkv2t7, film.film.country, Iran
The Past, film.film.country, Iran
g.11b72kxnqq, film.film.country, Iran
Once Upon a Time, film.film.country, Iran
g.12qhl22m3, film.film.country, Iran
Coma, film.film.country, Iran
g.12qhky4q5, film.film.country, Iran
g.122y5qzb, film.film.country, Iran
g.12qhl04y1, film.film.country, Iran
g.12qhk7m82, film.film.country, Iran
The Last Step, film.film.country, Iran
Iran, common.topic.notable_for, g.12594tk__
g.12qhk9y02, film.film.country, Iran
g.12qhk7m89, film.film.country, Iran
Retaliation, film.film.country, Iran
g.12qhkd1s_, film.film.country, Iran
g.12qhkq01m, film.film.country, Iran
g.12qhkd1t7, film.film.country, Iran
g.12qhkdn56, film.film.country, Iran
m.011sm2gw, film.film.country, Iran
g.12qhkd1t9, film.film.country, Iran
Iran, location.location.events, Persian Expedition of 1796
g.12qhkw6q8, film.film.country, Iran
g.12qhkyc86, film.film.country, Iran
g.12qhkr57c, film.film.country, Iran
g.12qhk8l3m, film.film.country, Iran
g.12qhkyc88, film.film.country, Iran
g.12qhkt3g5, film.film.country, Iran

Answer: 1988