instruction:
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. 
question:
Bees find a place for the hive, such as a rock crevice or tree branch. Bees gather nectar from flowers. The bees evaporate the nectar by passing it back and forth to each other. The evaporation turns the nectar into sugary honey. The bees chew the honey until it turns into moldable wax. The bees mold the wax into hexagonal (six sided) cylinders. Thousands of these hexagonal cylinders put together form the hive. 
answer:
bees ,nectar ,honey ,wax ,cylinders ,hive 


question:
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. 
answer:
ice tray ; tray ,ice cubes ,cold water 


question:
Air rises. Rising air cools. Water vapor forms. Water vapor condenses. Clouds form. 
answer:

air ; rising air ,water vapor ,clouds