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: A plant of animal dies in a watery environment. Is buried in mud and silt. Soft tissues quickly decompose leaving behind hard bones or shells. Over time sediment builds over the top and hardens into rock. As the bone decays mineral seeps in replacing it. Fossils are formed. 
Example Output: plant; animal ,soft tissues ,bones ,mineral ,fossils 

Example Input: During evaporation the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air. Water vapor in the air gets cold and changes back into liquid, forming clouds, which is called condensation. Precipitation occurs when so much water has condensed that the air cannot hold it anymore. Water falls back to the earth in the form of rain, hail, sleet or snow. When water ends up on land, it will either soak into the earth and become part of the "ground water" for animals or plants to drink. It may also run into the oceans, lakes, or rivers where the cycle starts again. 
Example Output: water ,vapor; steam; water vapor ,clouds ,rain ,hail ,sleet ,snow 

Example Input: Bees go out during the day and gather food. Then while gathering of their food, they make wax, which is the building block of their bee hive. Bees make food called honey. They use a sticky, glue-like substance called propolis as a binding to hold their hives together. Bees produce all of the building blocks to build their hive in their own body. 
Example Output:
bees ,food ,wax ,honey ,propolis ,hives