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: The base of a nucleotide within dna consists of nitrogen. Question: What does the base of a nucleotide within dna consist of?

Output: nitrogen


Input: Consider Input: Sentence: The overall purpose of the light-dependent reactions is to convert light energy into this? Question: The overall purpose of the light-dependent reactions is to convert light energy into this?

Output: chemical reactions


Input: Consider Input: Sentence: Exemplified by baring teeth, aggressive type of displays are common in the animal kingdom, and sometimes serve as a 'bluff'. Question: Exemplified by baring teeth, what type of displays are common in the animal kingdom, and sometimes serve as a 'bluff'?


Output: aggressive