Did Greg Mullen serve for the City of Charleston Police Department or the Virginia Beach Police Department first?
return Greg Mullen serves for the  City of Charleston Police Department  ;return Greg Mullen serves for the  Virginia Beach Police Department  ;return when  was  #1 ;return when  was  #2 ;return which is the  lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']