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


question:
Prairie dogs bear four or ____ young per litter.
answer:
five


question:
Physicists now think of light in terms of photons, particles that have ____ mass but carry momentum.
answer:

no