The source of this river is at the top of the mountain.

His new project is attracting a lot of attention.

This document contains important information.

This problem falls into the category of mathematics.

This brass vase is very beautiful.

He takes an agnostic stance on religion.

He says 'knowledge is power' and studies hard every day.

Their problem was clearly visible to me, a bystander.

He is making a Rube Goldberg machine at home.

His story, after a caesura, started again.