instruction:
Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
question:
Arthropods are made up of ____ groups of living animals and one group of extinct animals.
answer:
four


question:
Orchestra conductors live ____ to seven years longer than is usual in their societies.
answer:
three


question:
Most modern cars have disc brakes on the front wheels, and some have disc brakes on all ____ wheels.
answer:

four