Conversation so far:
who sang tie a yellow ribbon round the oak tree
Tie a Yellow Ribbon Round the Ole Oak Tree is a song recorded by Tony Orlando and Dawn.
Who is Tony Orlando from Tony Orlando and Dawn?
Michael Anthony Orlando Cassavitis known as Tony Orlando, is an American singer, songwriter, producer, music executive, and actor.

Question: how about the second person
Self-contained rewrite: Who is Dawn from Tony Orlando and Dawn?