instruction:
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.
question:
Human malaria is caused by ____ species of Plasmodium . .
answer:
four


question:
Box turtles are mature and capable of mating at ____ years old.
answer:
five


question:
Parthenogenesis often happens where there are ____ males of a species in the vicinity.
answer:

no