水鉛 すいえん鉛鉱 えんこうではありませんでした
suien'enkōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 水鉛鉛鉱

1. It was not lead ore.; It was not a lead mine.

Past/Perfective
Negative
Polite
Formal Register
Geology