Zoo staff must clean up the animals' excrement every day.

This animal is a protected species, so you must never touch it.

The police found an explosive substance at the location.

This compound was newly discovered by scientists.

He was reading a true account of the incident.

This material evidence indicates that he is the culprit.

Please do not place combustibles near the fire.

This oxide is a compound made up of oxygen and other elements.

This building has existed for centuries.

My grandmother is good at making homemade pickles.