Premise: The 1987 Federation Cup was the 25th edition of the most important competition between national teams in women 's tennis . The French Open , often referred to as Roland-Garros ( [ ʁɔlɑ̃ ɡaʁɔs ] ) , is a major tennis tournament held over two weeks between late May and early June at the Stade Roland-Garros in Paris , France . The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Steffi Graf . Furthermore , she is the only tennis player to have won each Grand Slam event at least four times . Consequently , Graf 's Grand Slam was achieved on grass , clay , and hard court while the previous five Grand Slams were decided on only grass and clay .
Hypothesis: Steffi Graf is a tennis player.
Label: ENTAILMENT