What event happened first, a young girl being killed, or 3 Iranian officers being killed by unidentified gunmen?
return a young girl was  killed  ;return 3 Iranian officers being killed  by unidentified gunmen ;return when  was  #1 ;return when  was  #2 ;return which is lowest officers #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']