爆発 ばくはつ せい戦争 せんそう残存 ざんぞん ものでしょう
bakuhatsuseisensōzanzon monodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 爆発性戦争残存物

1. Likely unexploded ordnance.; Possibly explosive remnants of war.

Polite
Presumptive
Conjecture