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:
Some people routinely sleep only ____ hours a night but feel fine during the day.
answer:
four


question:
Green energy comes in ____ basic forms.
answer:
two


question:
Sexual maturity occurs at three to four years for females and four to ____ years for males.
answer:

five