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:
Marshes are shallow wetlands less than ____ meters deep.
answer:
two


question:
Males mature sexually as soon as ____ years of age.
answer:
two


question:
Some olive trees live to be ____ thousand years old.
answer:

two