Premise: Serena Williams . As a team , she and Venus have the third most women 's doubles grand slam titles , behind the 18 titles of Natasha Zvereva ( 14 with Gigi Fernández ) and the record 20 titles won by Martina Navratilova and Pam Shriver .
Hypothesis: Serena Williams is a Grand Slam winner.
Label: ENTAILMENT