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.

Q: Elves are the first of the ____ families of fairy People.

A: eight
****
Q: Sponges have ____ main tissue layers.

A: three
****
Q: P is the result of ____ E-fields.

A:
two
****