In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: What kind of family is haumea part of? Answer: a collisional family
Haumea is part of the a collisional family.

Question: What are four children born at one birth called? Answer: quadruplets
Four children born at one birth are called quadruplets.

Question: What is caused by the buildup of stress in the rocks? Answer: ground tilting

Ground tilting is caused by the buildup of stress in the rocks.