response: Oh Nadal?  Well he's won a lot of titles, tournaments and medals.
original_response: I'd agree with that, he's won 16 grand slam singles titles!
history: I think Rafael Nadal is the best tennis player of all time. What do you think?
knowledge: Nadal has won 16 Grand Slam singles titles, 30 ATP World Tour Masters 1000 titles, 19 ATP World Tour 500 tournaments, and the 2008 Olympic gold medal in singles.