かく兵器 へいき禁止 きんし条約 じょうやくじゃなかったです
kakuheikikinshijōyakujanakattadesu

Noun
Desu Copula

The polite, past negative form of 核兵器禁止条約

1. Wasn't the Nuclear Weapons Prohibition Treaty.

Past/Perfective
Negative
Polite
Casual Register