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:
Dogs have to be ____ months old before they are spayed or neutered.
answer:
six


question:
Most bioluminescence is blue for ____ reasons.
answer:
two


question:
Atoms are extremely small, on the order of a few ____ billionths of a meter.
answer:

ten