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: Carbon dioxide from the air passes through small pores (holes) in the leaves. These pores are called stomata. Water is absorbed by the roots. It passes through vessels in the stem on its way to the leaves. Sunlight is absorbed by a green chemical in the leaves. 

Output: carbon dioxide ,water ,sunlight 


Input: Consider 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. 

Output: bees ,food ,wax ,honey ,propolis ,hives 


Input: Consider Input: Warm water rises off the seas. The water condenses as it cools and gets higher in the air. Then the condensation forms into clouds. The clouds travel over areas on land. The clouds reach a saturation point. The rain falls from the clouds. 


Output: warm water ; water ,clouds ,rain