That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

His nature is very kind.

Detailed information is needed to understand the nature of that project.

I was moved by his sincerity.

His nature is very kind.

Natural language understanding is an important field of artificial intelligence.

Gender identity refers to the gender that each individual recognizes themselves as.

He is facing many difficulties due to gender identity disorder.