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The bus attack came just two days after Israeli forces staged a bloody raid into a refugee camp in central Gaza targeting a founding member of Hamas , which has spearheaded suicide bombings against the Jewish state .
 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