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 band had a 1999 hit with Iris?
answer:
goo goo dolls

question:
In November 2014, a European Space consortium succeeded in landing a vehicle on a comet after a 10 year journey. What was the name of the mission?
answer:
rosetta

question:
In Greek mythology, what is the name of the many-headed monster slain by Heracles?
answer:
hydra