Input question: Night blindness is caused by a deficiency of which vitamin?

Output answer: vitamin

Input question: Frank Sinatra, Dean Martin, and Sammy Davis Junior were among several entertainers given what collective nickname?

Output answer: rat pack

Input question: Coprolite is the name given by archaeologists to fossilized ..what?

Output answer: faeces

Input question: What type of creature is a 'Rorqual'?

Output answer:
whale