Question: Which of the following won 19 Grand Slam single titles as a professional tennis player: Roger Federer or Jonathan Stark?
Sentence (from "2017 Australian Open – Men's singles final"): Having lost all of their previous three encounters, this was the first time Federer defeated Nadal at the Australian Open and also marked Federer's first Grand Slam victory over Nadal outside the grass courts of Wimbledon.
Relevant evidence: No