消滅 しょうめつ可能 かのう せい都市 としでした
shōmetsukano useito shideshita

Noun
Desu Copula

The polite past form of 消滅可能性都市

1. It was a city with a possibility of disappearing.; It used to be a city with a possibility of disappearing.

Past/Perfective
Polite