instruction:
In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to provide one question which clarifies the input question and it has one unique answer, and also provide an answer to the generated question. Generated question and answer should be separated with a new line.
question:
Sharks rays and skates belong to what group?
answer:
Sharks rays and skates belong to what class? 
 Chondrichthyes


question:
Where does the amazon river start and end?
answer:
Where does the amazon river start according to understanding before 2014? 
 headwaters of the Apurímac River on Nevado Mismi


question:
Who wrote wake me up when its all over?
answer:

Who collaborated to write wake me up when its all over? 
 Avicii, Mike Einziger, and Aloe Blacc