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:
Some species bear living offspring only every three to ____ years.
answer:
five

question:
Tuberculosis develops in ____ stages.
answer:
two

question:
Mares can have ____ or two foals.
answer:
one