熱水 ねっすい噴出 ふんしゅつ こうじゃありませんでした
ne' suifun shutsu kōja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 熱水噴出孔

1. It wasn't a hot water vent.; It wasn't a geyser.

Past/Perfective
Negative
Polite
Terminal Form