Premise: Maria Sharapova . She has been ranked world No. 1 in singles by the WTA on five separate occasions , for a total of 21 weeks . The Women 's Tennis Association ( WTA ) , founded in 1973 by Billie Jean King , is the principal organizing body of women 's professional tennis .
Hypothesis: Maria Sharapova is in the Women's Tennis Association, founded by Billie Jean King.
Label: ENTAILMENT