Task: Explanation
Input (English): Hei is the debut album of the Norwegian child duo Marcus & Martinus, winners of the Norwegian Melodi Grand Prix Junior 2012. The album released on Sony Music Entertainment on 23 February 2015 and was successful, peaking at number 2 on the Norwegian Albums Chart. A special follow-up album was released nine months later on 6 November 2015 also on Sony including additional tracks. The special edition was titled "Hei – Fan-Spesial". Question: The winners of the Norwegian Melodi Grand Prix Junior 2012 are how old? Answer: 15 years
Output (English): Hei is the debut album of the Norwegian child duo Marcus  Martinus, winners of the Norwegian Melodi Grand Prix Junior 2012.