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:
Ground squirrels have a single litter a year that averages from ____ to nine young.
answer:
four


question:
Warts have a finite life span of anywhere from six months up to ____ years.
answer:
five


question:
Natural indium contains ____ isotopes.
answer:

two