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.

Input: Consider Input: Sentence: A metallic bond is the force of attraction between a positive metal ion and valence electrons. Question: What is the force of attraction between a positive metal ion and valence electrons?

Output: metallic bond


Input: Consider Input: Sentence: The ice crystals that form on the ground are called frost. Question: What are the ice crystals that form on the ground called?

Output: frost


Input: Consider Input: Sentence: Phospholipids are vesicles made of. Question: What are vesicles made of?


Output: phospholipids