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: Gather the ingredients for the cake. Mix the flour, sugar, egg, and water to make batter. Pour the mixture into a cake pan. Place the cake in the oven to cook. Take the cake out when it is cooked through. Let the cake cool. Serve the cake. 

Output: Describe how to make a cake.


Input: Consider Input: Water flows by rocks. Chemicals are in the waters. Chemicals react with rocks. Rocks change to a different kind of rock. Oxygen in the air reacts with rocks. Rocks change to a different kind of rock. 

Output: What happens during chemical weathering?


Input: Consider Input: Rain clouds travel across the sky. Rain clouds are stopped or slowed by mountains or wind. The rain clouds drop the rain. The clouds are no longer raining when or if they reach the other side of the obstacle. On the other side of the mountains or rain, there isn't much rain. The area that receives little rain develops a very different ecosystem. The area that receives little rain becomes a desert. 


Output: How are deserts formed?