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:
Stems are of ____ types, flowering and vegetative.
answer:
two

question:
All crabs have ____ pair of chelipeds and four pairs of walking legs .
answer:
one

question:
Pathologists study ____ to five years after medical school and their postgraduate training.
answer:
four