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. 

Example 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. 
Example Output: algae ,plankton ,sediment ,material ,oil 

Example Input: A plant dies. Bacteria from the ground migrate to the plant material. Bacteria release enzymes onto the plant material. The enzymes break down the plant cells to simpler components. The bacteria absorb the resulting components. 
Example Output: bacteria ,enzymes ,plant cells ,components 

Example Input: Green is a color that gathers sunlight easily. Sunlight is gathered by the leaves of the plant. The sunlight is broken down into glucose through photosynthesis. The glucose travels the plant. The plant uses that glucose as energy to grow. 
Example Output:
sunlight ,glucose ,energy