Teacher:Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Teacher: Now, understand the problem? Solve this instance: Context: Rosemary's Billygoat is an American heavy metal/hard rock band formed in Los Angeles ' South Bay in 1991, consisting of singer Mike Odd, guitarist Neal Gargantua, bassist Pat Trick and drummer Paul Bearer.
Question: The year that Rosemary's Billygoat was created was?
Student:
1991