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:
Differentiation is caused by the energy going in ____ directions.
answer:
two


question:
Tin has ____ allotropic forms.
answer:
two


question:
Infectious spores can live for up to ____ weeks on contaminated objects.
answer:

eight