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: You receive a vaccination through an injection or a nasal spray. The vaccine contains a weakened version of the virus or bacteria responsible for the disease. The body's immune system reacts to the virus or bacteria. The immune system creates antibodies to fight the virus or bacteria. The antibodies remain in the body. The antibodies are ready to fight the disease if the person is infected with the disease. 
Example Output: virus or bacteria ,antibodies 

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: You receive a vaccination through an injection or a nasal spray. The vaccine contains a weakened version of the virus or bacteria responsible for the disease. The body's immune system reacts to the virus or bacteria. The immune system creates antibodies to fight the virus or bacteria. The antibodies remain in the body. The antibodies are ready to fight the disease if the person is infected with the disease. 
Example Output:
virus or bacteria ,antibodies