once in a blue moon origin of phrase???

Answer: rarity of a blue moon
Question: which university in the us has the most students?

Answer: University of Central Florida
Answer this question: what was the ford version of the el camino??

Ford Ranchero coupé utility
Q: who got the most clean sheets in the premier league 2016/17?A: Thibaut Courtois
Input: who sings on a little help from my friends?

Output: the Beatles
Input: who plays mr grey in 50 shades of grey movie?

Output:
James Dornan