Task: Explanation
Input (English): Marcus & Martinus, sometimes known as M&M, is a Norwegian pop duo composed of twin brothers Marcus Gunnarsen and Martinus Gunnarsen (born 21 February 2002) from Trofors. They are both 15 years old, and have released three albums. Question: The winners of the Norwegian Melodi Grand Prix Junior 2012 are how old? Answer: 15 years
Output (English):  They are both 15 years old, and have released three albums.