From someone who has never been known to have become known because the events occurred, have come to know each other and a relationship that still exists, even if it does not meet or.
From people who have never known it became known, because these events occur so have come to know each other, and that relationship remains even if not met, or are close to each other.
From someone who didn't know each other have become known, because there are various events happen so was known and the relationship that remain, although not see or close together.