Premise: Serena Williams . She is also the most recent player , together with her sister Venus Williams , to have held all four Grand Slam women 's doubles titles simultaneously ( 2009 -- 10 ) . She has won 14 Grand Slam doubles titles with her sister Venus , and the pair are unbeaten in Grand Slam doubles finals .
Hypothesis: Serena Williams and her sister share a record.
Label: ENTAILMENT