集団 しゅうだん しょく中毒 ちゅうどくではありませんでした
shūdanshokuchūdokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 集団食中毒

1. Was not a group food poisoning.; Was not a case of group food poisoning.

Past/Perfective
Negative
Polite
Formal Register