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:
All orthodontists are dentists, but only about ____ percent of dentists are orthodontists.
answer:
six


question:
Rifts develop from separate domes creating ____ legged rift faults that join each other.
answer:
three


question:
Sea lamprey have an indirect life cycle lasting between five and ____ years.
answer:

nine