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The Japanese terrorist cult Aum Shinrikyo -- which launched the infamous Sarin gas attack on the Tokyo subway system in 1995 -- was discovered to have experimented with the use of lasers as weapons . According to The Asian Pacific Post , " Cult members apparently obtained laser design information from Russian institutes they visited and built a laser weapon mounted on a truck .
 attack: attack
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: declare bankruptcy, transfer ownership, marry, die, phone write, arrest jail, convict, sue, transfer money, end organization, start organization, end position, merge organization, start position, transport, charge indict, elect, attack, injure, born, extradite, release parole, sentence, demonstrate, meet, trial hearing, divorce, nominate, fine, appeal, pardon, execute, acquit 
Text: {0} 
Answer:
 attack: attack