TASK DEFINITION: In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
PROBLEM: Sentence: A sudden flow of mud is called a(n) mudflow. Question: What's it called when there's a sudden flow of mud?

SOLUTION: mudflow

PROBLEM: Sentence: Lakes do craters and rifts become when they fill with water. Question: What do craters and rifts become when they fill with water?

SOLUTION: lakes

PROBLEM: Sentence: Star clusters are groups of stars called that are smaller than a galaxy. Question: What are groups of stars called that are smaller than a galaxy?

SOLUTION:
star clusters