He is majoring in political science at university.

He is a renowned political scientist who has written many important papers.

We should avoid the politicization of sports.

It is not appropriate to politicize this issue.

He likes to take a walk in the park at dusk.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

Well then, I'm off.

He thoroughly researched the history of that nation.

He is a famous composer.

He is a famous lyricist who has produced many hit songs.