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British officials say they believe Hassan was a blindfolded woman seen being shot in the head by a hooded militant on a video obtained but not aired by the Arab television station Al - Jazeera .
 militant: attacker; woman: target
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: attack 
  Option: victim, attacker, place, target, instrument 
Text: {0} 
Answer:
 militant: attacker; woman: target