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:
Females usually reach sexual maturity at about four years of age, males at about ____ years.
answer:
six


question:
Acupuncture needles are about two to ____ inches long.
answer:
three


question:
Barn swallows are about six to ____ and one half inches in length.
answer:

seven