Premise: 1991 NBA Finals . The Chicago Bulls of the Eastern Conference took on the Los Angeles Lakers of the Western Conference for the title , with Chicago having home court advantage . Prior to 1991 , they met for four postseason series ( 1968 , 1971 , 1972 and 1973 ) , all Lakers victories . The 1991 Finals marked the first time the Bulls defeated the Lakers in a playoff series .
Hypothesis: The 1991 NBA Finals had the Lakers in it.
Label: ENTAILMENT