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:
Babies start swimming lessons as young as ____ weeks old.
answer:
four


question:
Manatees swim ____ to six miles per hour.
answer:
two


question:
Humans have ____ different types of antibodies which are given shorthand names.
answer:

five