instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
The love canal tragedy was an infamous example of industrial waste dumping.
answer:
Love canal was an infamous example of what type of pollution?


question:
Gabbro is a dark dense rock that can be found in the oceanic crust.
answer:
Gabbro is a dark dense rock that can be found in what?


question:
Food chains carry energy from producers to consumers.
answer:

Food chains carry energy from what group to what group?