instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Six many neutrons do 99% of carbon atoms have.
answer:
How many neutrons do 99% of carbon atoms have?


question:
Are humans a new or old species on the earth?
answer:
Are humans a new or old species on the earth?


question:
Sedimentation is the term for when clumped solids sink to the bottom of the water.
answer:
What is the term for when clumped solids sink to the bottom of the water?