Conversation so far:
What year did Lionel Messi retire?
Lionel Messi's first retirement was June 26, 2016.
Why did Lionel Messi retire?
Lionel Messi, who had missed his penalty in the shootout, announced his retirement from football. He stated, I tried my hardest. The team has ended for me, a decision made.“

Question: Did he ever come out of retirement?
Self-contained rewrite: Did Lionel Messi ever come out of retirement?