He wrote an ancient poem on parchment.

I learned about the properties of arsenate in chemistry class.

We will use arsenic acid in this chemistry experiment.

A bat is a small mammal that is active at night.

We will use arsenic in this chemical experiment.

The water caltrop is a beautiful plant that floats on the water surface.

He felt that his origin was humble.

His humbleness made him a very popular person among people.

She is always the best subject of a photograph.

She quietly called his name.