TASK DEFINITION: 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.
PROBLEM: Ospreys mature after ____ years of age.

SOLUTION: two

PROBLEM: Traffic lights have ____ colors.

SOLUTION: three

PROBLEM: Wolverines reproduce every two or ____ years .

SOLUTION:
three