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:
Most children start primary school at ____ years of age.
answer:
five


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


question:
Galaxies exist in ____ basic forms, with variations.
answer:

two