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: Harpists spend ninety percent of their lives tuning their harps and ____ percent playing out of tune.

SOLUTION: ten

PROBLEM: Calves are born after a gestation of ____ months.

SOLUTION: nine

PROBLEM: Cockleburs produce ____ kinds of flowers.

SOLUTION:
two