Premise: But more immediately, it was when the kapu system of taboos broke down completely under the leadership of young King Kamehameha II (the first king's son, Liholiho) and the regent, Kaahumanu (the favorite of the 21 wives of the first king).

Hypothesis: Under the leadership of King Kamehameha II, the kapu system of taboos broke down.
Relation: entailment