Task: Question Answering
Input (English): In 1987, a supernova was detected in the Large Magellanic Cloud galaxy, which is approximately 169,000 light years from Earth. Which event produces a supernova?  
 (A) the explosion of a massive star (B) the birth of a main-sequence star (C) the collapse of a medium-sized star (D) the collision of one star with another
Output (English): A