He was confused after reading the bizarre document.

He went to the archives to find important information.

This old document is very important for understanding our history.

It was revealed that he was polygamous, which became a big problem.

As a result of the double trial, he was judged innocent.

This problem is very complex, and it is difficult to solve.

This market is in a state of duopoly by two large companies.

Recently, I've been experiencing symptoms of diplopia, and I'm worried.

He is enjoying the same game over and over again by using multiple accounts.

He is good at mathematics.