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: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this? Question: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this?

Output: their external skeleton

Input: Consider Input: Sentence: Calculations are described showing conversions between molar mass and density for gases. Question: Calculations are described showing conversions between molar mass and what for gases?

Output: density

Input: Consider Input: Sentence: Reptiles are described by the term ectothermic, which means their internal temperature depends on the temperature of their environment. Question: Reptiles are described by what term that means their internal temperature depends on the temperature of their environment?
Output: ectothermic