Question: How many Grand Slam titles were won by the defending champion of the 1981 US Open - Women's Doubles?  
Sentence (from "2012 US Open – Men's singles final"): By winning the 2012 US Open, Murray became the first British man since Fred Perry in 1936 to win a Grand Slam singles title, and the first British man in the Open Era to do so.
Relevant evidence: No