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:
Aboriginal society is divided into ____ complementary branches.
answer:
two


question:
Neutrinos are particles with almost ____ mass and no electric charge.
answer:
no


question:
Natural ytterbium is a mix of ____ stable isotopes.
answer:

seven