ケネディ大統領 だいとうりょう暗殺 あんさつ事件 じけんであれば
kenedi daitōryōansatsujikendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of ケネディ大統領暗殺事件

1. If the Kennedy assassination happened; If there had been a Kennedy assassination

Ba Conditional