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.

Q: Sentence: The earth's crust is composed of igneuos rock. Question: What is the earths crust composed of?

A: igneuos rock
****
Q: Sentence: Chemical energy is stored in the atom bonds. Question: Where is chemical energy stored?

A: atom bonds
****
Q: Sentence: The amniotic sac, which was sitting on top of the flat embryo, envelops the embryo as it folds. Question: What sac, which was sitting on top of the flat embryo, envelops the embryo as it folds?

A:
amniotic sac
****