植物 しょくぶつ せい繊維 せんいではありませんでした
shokubutsuseisen idewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 植物性繊維

1. Was not plant-based fiber.; Was not vegetable fiber.

Past/Perfective
Negative
Polite
Formal Register