Task: Explanation
Input (English): Johann Sebastian Bach (31 March [O.S. 21 March] 1685 28 July 1750) was a German composer and musician of the Baroque period. He is known for instrumental compositions such as the "Brandenburg Concertos" and the "Goldberg Variations", and vocal music such as the "St Matthew Passion" and the Mass in B minor. Since the 19th-century Bach Revival he has been generally regarded as one of the greatest composers of all time. Question:  Ach Gott, wie manches Herzeleid, BWV 3 was a cantata by which "Brandenburg Concertos" composer? Answer: Johann Sebastian Bach
Output (English):  He is known for instrumental compositions such as the Brandenburg Concertos and the Goldberg Variations, and vocal music such as the St Matthew Passion and the Mass in B minor.