Conversation so far:
When dd Robbie O'Connell join the group?
1977.
Why did they decide to add him?
They asked him to take on the role Liam had vacated in the group.
Why did Liam leave?
CANNOTANSWER.

Question: did they record an album with the new lineup?
Self-contained rewrite: did The Clancy Brothers record an album with the new lineup?