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:
Mental illness enters the lives of at least one in ____ families.
answer:
four


question:
Penguins have ____ seasons in their year, as follows.
answer:
four


question:
Laughter first appears around three to ____ months in response to active stimuli.
answer:

four