He is working at a construction site.

The police collected evidence from the crime scene.

Have a good day at school, son.

When her son goes to school, the mother always says 'see you later'.

We are in a common-law marriage.

As a matter of fact, he is the leader of our team.

In view of the facts, his actions are understandable.

That rumor is groundless.

He falsified the fact to hide his mistake.

His mistake of fact caused a big problem.