Input question: In which book did Hercule Poirot first appear?

Output answer: mysterious affair at styles

Input question: What part of the body has a crown and a root

Output answer: tooth

Input question: Domingo Liotta MD, of Argentina, designed and developed the first artificial what, which was successfully implanted in a human in 1969?

Output answer: heart

Input question: Complete the title of this 1960's Group - 'Bachman Turner ....'

Output answer:
overdrive