いち酸化 さんか炭素 たんそ中毒 ちゅうどくではありませんでした
ichisanka tansochūdokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 一酸化炭素中毒

1. Was not carbon monoxide poisoning.; Was not poisoned by carbon monoxide.

Past/Perfective
Negative
Polite
Formal Register
Medicine