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. 

Ex Input:
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. 

Ex Output:
waste ,blood ,cleaned blood ,filtered waste ,urine 


Ex Input:
Warm air rises. Then it expandes and cools. Some of the vapor condenses onto tiny pieces of dust that are floating in the air. Forms a tiny droplet around each dust particle. Billions of these droplets come together they become a visible cloud. 

Ex Output:
warm air ,vapor ,tiny pieces of dust ; dust particle ,droplet ,cloud 


Ex Input:
Add dirty laundry to the washing machine. Add laundry detergent to the washing machine. Select the setting for the load of laundry. Close the door of the washing machine. Turn on the washing machine. 

Ex Output:

dirty laundry ,laundry detergent