sentence1: When Professor Wang looked at the rosters for this term ' s classes , she saw that the roster for her economics class ( E ) had less than 30 names , the roster for her marketing class ( M ) had 28 , and the roster for her statistics class ( S ) had 18
sentence2: When Professor Wang looked at the rosters for this term ' s classes , she saw that the roster for her economics class ( E ) had 20 names , the roster for her marketing class ( M ) had 28 , and the roster for her statistics class ( S ) had 18