In this task, you are given a paragraph, and your job is to generate comma-separated entities present in the given paragraph. Generate entities from a given passage in such a way that (i) they are present in the paragraph, (ii) they are non-duplicate, (iii) they underwent a state change during the process. Avoid creating entities that (i) aren't present in the process paragraph and (ii) aren't significant.
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Question: The gravity of the sun pulls its mass inward. There is a lot of pressure on the Sun. The pressure forces atoms of hydrogen to fuse together in nuclear reactions. The energy from the reactions gives off different kinds of light. The light travels to the Earth.

Answer: atoms of hydrogen ,sunlight; light

Question: 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.

Answer: gases ,pressure ,magma; molten magma ,volcano

Question: Waste builds up in the blood. Blood enters the kidney. Blood passes through nephrons in the kidney. Different kinds of waste are momentarily trapped in the kidney. Cleaned blood flows out of the kidney. Filtered waste accumulates in liquid form (urine). Urine flows out of the kidney into the bladder.

Answer:
waste ,blood ,cleaned blood ,filtered waste ,urine