上層 じょうそう階級 かいきゅうではありませんでした
jōsōkaikyūdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 上層階級

1. Was not of the upper class.; Was not upper class.; Was not from the upper class.

Past/Perfective
Negative
Polite
Formal Register