He started a fire using coal.

His answer was short.

I am the type of person who consults with friends.

Carbon is one of the basic elements of life.

This ring is made of titanium.

Tungsten is a very hard metal that is resistant to high temperatures.

Lanthanum is one of the chemical elements, and its symbol is La.

In this experiment, we will use the International System of Units.

He is a very excellent detective.

He went out in the middle of the night to covertly investigate the incident.