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: Photons have ____ mass and no electrical charge.

SOLUTION: no

PROBLEM: Viceroys produce ____ generations per year, and the food habits of each generation differs.

SOLUTION: three

PROBLEM: Sharks have a total of six senses, ____ of which are involved in locating food.

SOLUTION:
five