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: Carbon dioxide from the air passes through small pores (holes) in the leaves. These pores are called stomata. Water is absorbed by the roots. It passes through vessels in the stem on its way to the leaves. Sunlight is absorbed by a green chemical in the leaves.
Example Output: carbon dioxide ,water ,sunlight

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: Items are collected. The items are sorted. Trash is removed from everything else. Goes to a landfill. The items go into a baler machine for each kind of material. They come out as bales. The bales are shipped to manufacturers to use to make products.
Example Output:
items ,trash ,bales ,products