Number theory is a branch of mathematics that primarily studies the properties of integers.

This dress is made of damask.

This sculpture was made using sandblasting technology.

He sandblasted the wall.

He was cultivating bacteria in a Petri dish.

We visited the undershrine located halfway up the mountain.

His talk is full of wit.

He is drawing a picture using a trace.

He traced the picture.

He is recognized as a strong competitor.