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: Niobium occurs primarily in ____ minerals, columbite and pyrochlore.

SOLUTION: two

PROBLEM: Smoking causes lung cancer in ____ ways.

SOLUTION: two

PROBLEM: Cesarean section are ____ to four times more likely for pregnant women with diabetes.

SOLUTION:
three