階層 かいそう もく構造 こうぞうじゃなかったです
kai sōmokukōzōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 階層木構造

1. Was not a hierarchical tree structure.; Wasn't a hierarchical tree structure.

Past/Perfective
Negative
Polite
Casual Register
Computing