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:
Humans grow with ____ sets of teeth.
answer:
two


question:
Primates have ____ digits on their forelimbs.
answer:
five


question:
Female dugongs give birth to just one calf about once every ____ years.
answer:

five