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: Metallic bonds hold together positive metal ions and their valence electrons. Question: What types of bonds hold together positive metal ions and their valence electrons?

Output: metallic bonds


Input: Consider Input: Sentence: Producing light without heat is called luminescence. Question: Producing light without heat is called what?

Output: luminescence


Input: Consider Input: Sentence: Prokaryotes are unicellular organisms that lack organelles surrounded by membranes. Question: Prokaryotes are unicellular organisms that lack organelles surrounded by what?


Output: membranes