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:
Most newborns nurse every one to ____ hours, even at night.
answer:
three


question:
Humans have two lungs, each fed by ____ bronchus.
answer:
one


question:
Smoking is responsible for an estimated ____ in five U.S. deaths.
answer:

one