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. 

Input: Consider Input: Blood enters the kidney. The blood travels into the neophrons. Waste is expelled via the neophrons. The waste goes to the bladder in the form of urine. The clean blood exits the kidneys. 

Output: blood ; clean blood ,waste ,urine 


Input: Consider Input: Cold water taken in through a hose to the bottom. Heating element heats water. Pump forces water up in pipes connected to spinning paddles. The forced water makes paddles spin like a sprinkler. Water comes out of small holes in paddles. Water is collected and used again until dishes are clean. Water is drained through a filter. Filter collects particles of food. Water was so hot that it evaporates for dry dishes. 

Output: water ,particles of food 


Input: Consider Input: Stars burn mass. The star burns until it runs out of fuel. The star can no longer support its weight. The layers of hydrogen press down on the core. The core gets smaller and smaller under the pressure. The pressure causes gravity to get stronger. The gravity becomes so powerful that nothing can escape it. Anything that gets close to it, is drawn into it by its gravity. Light is drawn into it. Light can not escape. 


Output: Mass ,Fuel ,Gravity