TASK DEFINITION: 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.
PROBLEM: Which ELO song features Wagner, Beethoven, Puccini and Verdi?

SOLUTION: rockaria!

PROBLEM: Created by Nintendo in the 1980's, what is the profession of the video game character (Super) Mario?

SOLUTION: plumber

PROBLEM: The most important text of what popular practice, varieties of which include hatha, mantra and raja is attributed to Patanjali?

SOLUTION:
yoga