533
WASHINGTON _ Having punched through severely depleted Republican Guard divisions that formed Baghdad ' s outer defensive ring , U . S . Army and Marine forces are likely to pause again to test the Iraqi capital ' s inner defenses and waall but evaporated under the weight of the U . S . assault .
 attack: punched through
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: punched through