Input question: "What delta do ""Delta Blues"" come from?"

Output answer: mississippi delta

Input question: The fashion designer John Galliano was born in which British overseas territory?

Output answer: gibraltar

Input question: What conference, which is now held in Europe, Asia, as well as the US, hosts a series of talks of 18 minute maximum length, devoted to "ideas worth spreading"?

Output answer: ted talks

Input question: Brothers O'Kelly, Rudolph, Ernie, and Marvin were founder members of which US group?

Output answer:
isley brothers