instruction:
Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
question:
Which John Legend song knocked Pharell Willams completely off the No.1 spot on the US Billboard?
answer:
all of me


question:
Which breed of dog takes its name from a state in Mexico?
answer:
chihuahua


question:
Which composer wrote the operas Tosca, Madame Butterfly and Turandot?
answer:

giacomo puccini