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 Input:
Minerals fill spaces between bits of sediment. The sediments become glued together. The glued together parts become hard like cement. The sediment becomes a big rock. The rocks erode slowly. The rocks come apart. The rocks become smaller rocks. The rocks continue to erode into smaller rocks. The process starts again. 

Ex Output:
How does sediment turn into sedimentary rock?


Ex Input:
The coal is placed in a heater. The coal is super heated. The heat is connected to a boiler. The boiler is full of water. The heat turns the water into steam. The steam turns a generator. The generator produces the electricity. 

Ex Output:
How does a coal-powered power station generate electricity?


Ex Input:
Gases cause pressure beneath the earth. The gases come to a head and push molten magma to the surface. The magma cools. With enough time the pressure builds up greatly. The resulting volcano may explode. 

Ex Output:

What causs a volcano to erupt?