We have a responsibility to protect this nature.

There are many large oak trees in this park.

Her necklace had a beautiful pearl on it.

A tumor was found in his brain.

What is the purport of this sentence?

He was greatly enjoying the old wine.

He instructed me in piano.

There was a big spider in the corner of the room.

He is good at playing the piano.

He is good at playing the piano.