Definition: 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: Get the ice tray. Remove any ice cubes currently in the tray. Fill the tray with cold water. Ensure the tray is evenly filled to an appropriate level. Open the freezer. Place the tray in the freezer. Close the freezer door. Wait. 
Output:
ice tray ; tray ,ice cubes ,cold water 