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: You wash the wound. You apply a bandaid or other covering if needed. The blood clots. A scab forms. The skin repairs itself under the protective cover of the scab. The scab falls off. 

Output: Wound ,Bandaid ,Blood clot ,Scab ,Skin 


Input: Consider Input: Fuels burns in the combustion chamber. The burning fuel creates energy. The upward motion cause air to be released into the cylinder. The piston compresses the air. A spark ignites the fuel and air inside the cylinder. The pressure pushes the piston down. The exhaust valve opens. The piston pushes the air out of the cylinder. 

Output: fuel ,air ,spark ,pressure 


Input: Consider Input: Fuel is converted to energy when air and petrol mix. The car engine burns the mix of air and petrol. Hot gas from the burning pushes the pistons. The resulting energy powers the crankshaft. Crankshaft powers the gears. The gears make the wheels roll. 


Output: air ,petrol; fuel ,energy ,hot gas