In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage.

Input: Consider Input: Algae and plankton die. The dead algae and plankton end up part of sediment on a seafloor. The sediment breaks down. The bottom layers of sediment become compacted by pressure. Higher pressure causes the sediment to heat up. The heat causes chemical processes. The material becomes a liquid. Is known as oil. Oil moves up through rock.

Output: How does oil form?

Input: Consider Input: A butterfly starts as an egg. The egg hatches. A larva emerges. The larva eats and grows. The larva sheds its skin. The larva enters a chrysalis. The pupa grows inside the chrysalis. The adult butterfly exits the chrysalis. The adult butterfly is now fully grown. The adult butterfly lays more eggs.

Output: Describe the lifecycle of a butterfly

Input: Consider Input: Coal is crushed. The coal is burned at high temperatures inside a boiler. The heat generated converts water to steam. The steam spins propeller blades in the turbine. The spinning turbine rotates coils in the generator. The rotating coils produce electricity. The electricity can be sent through the power grid.
Output: How does a coal-powered power station generate electricity?