These men might well know of the big cats and their relationship with man.

The fewer people who know of our relationship, the better.

Unfortunately they would never know of each other's biological relationship.

"I told him the school knew of our relationship, and we would have to stop seeing each other for a while."

They soon become close, not knowing of their real relationship with each other.

He said everyone on the committee "knew of my relationship with Nissan."

What do you know of the two men's relationship?

The two are old friends, but little more is known of their relationship.

He obviously knew of her relationship with Tony and wasn't fooled.

All three of them knew of his relationship to Emerson.