He was worst at word problems in elementary school math.

It is important to understand the importance of health.

His explanation was impossible to understand.

My room is on the second floor, and your room is above mine.

Tanaka-san, have you finished the report?

Mr. Ue is my best friend.

I had a picnic at Ueno Park.

I had a picnic at Ueno Park.

In ancient documents, the word '上' was used to refer to gods.

I had a picnic at Ueno Park.