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: Rape occurs every ____ minutes in the United States.

SOLUTION: six

PROBLEM: Some animals have only ____ or three chambers .

SOLUTION: two

PROBLEM: Meta attack leads to an arenium ion with only ____ resonance structures.

SOLUTION:
three