Definition: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Input: Context: AGRP has been demonstrated to be an inverse agonist of melanocortin receptors, to be specific MC3-R and MC4-R Link Information: Melanocortin receptor 3 is a protein that in humans is encoded by the MC3R gene. Question: What is the difference between the two melanocortin receptors?
Output:
Answer: Melanocortin receptor 3 is a protein that in humans is encoded by the MC3R gene.