Read the following paragraph and determine if the hypothesis is true:

Tyson, who served three years in jail for rape in the 1990s and who bit off part of Evander Holyfield's ear during a 1997 fight, still thinks he can be heavyweight champion again.

Hypothesis: Tyson served time in jail for biting of Evander's Holyfield's ear in the 1997 fight.
It's impossible to say