Natural language understanding is an important field of artificial intelligence.

This error is on line number 20.

My daughter caught fifth disease last week.

I bought a candy apple at the festival.

This room is very dirty.

His movement was very fast.

Tsutomu vowed eternal love.

He lives with the spirit of 'I alone am the honored one under heaven and on earth.'

His dream is to become a champion in mixed martial arts.

Alkynes play an important role in organic chemistry.