*[Taro-o  kaikosita hito]-ga Hanako-mo t kaikosiyooto siteiru no-wa naze/dooyuu riyuu de desu ka ?
Taro-ACC  fired person-NOM Hanako-too  is trying to fire COMP-TOP why/for what reason  COP Q
Why/For what reason is it that the person who fired Taro pg is trying to fire Hanako t, too?