延坪 のべつぼ とう砲撃 ほうげき事件 じけんであれば
nobetsubotō hōgekijikendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 延坪島砲撃事件

1. If/When the Yeonpyeong Island shelling incident…; Had the Yeonpyeong Island shelling incident…

Ba Conditional