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. 

[EX Q]: A rig drills into the earth where oil is present. A pipe is placed in the hole. A pump is added to the pipe. Oil is pumped out. Oil is placed in barrels. Barrels are loaded on trucks. Trucks go to a refinery. Crude oil is refined to motor oil. Motor oil is bottle. Shipped to gas stations. 
[EX A]: How does oil get from the ground to a gas station?

[EX Q]: A fuel source must produce heat. Heat is used to create steam. Steam will be used to power turbines. Turbines will work together with magnets to generate electricity. Electricity or moving electrons will then flow through wires. The wires will carry electrons to homes and businesses remotely. 
[EX A]: How does a nuclear power plant work?

[EX Q]: Dissolution of limestone forms caves. Rain gets carbon dioxide from the air. When rain goes into soil it creates an acid. The acid dissolves the limestone along cracks. Some will dissolve enough to form caves. 
[EX A]:
How do caves form?

