What event happened first, Whitaker becoming a CBS News Tokya correspondent, or a WBTV correspondent?
return Whitaker becoming a CBS News Tokya correspondent ;return when  was  #1 ;return Whitaker becoming a WBTV correspondent ;return when  was  #3 ;return which is lowest of #2 ,  #4
['select', 'project', 'select', 'project', 'comparison']