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:
Calcite makes up ____ well known rocks limestone and marble.
answer:
two


question:
Spermatogenesis creates ____ sperm of equal size.
answer:
four


question:
Most turbines have either ____ or three blades.
answer:

two