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: Gases is less dense then either solids or liquids. Question: What is less dense then either solids or liquids?

SOLUTION: gases

PROBLEM: Sentence: Stationary front weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses. Question: What weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses?

SOLUTION: stationary front

PROBLEM: Sentence: The lack of annihilation radiation coming to us from space proves that the universe is dominated by matter. Question: The lack of annihilation radiation coming to us from space proves that the universe is dominated by what?

SOLUTION:
matter