TASK 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. 
PROBLEM: A mold spore floats through the air. The spore lands on a piece of bread. The spore grows hyphae into the bread. The mold forms a colony. Sporangiophores grow upward. The mold sends out spores. 

SOLUTION: mold spore ; spore ; mold ,colony ; sporangiophores 

PROBLEM: Chemical reactions in the battery causes a build up of electrons at the anode. This results in an electrical difference between the anode and the cathode. The electrons wants to rearrange themselves to get rid of this difference. The electrons go to the cathode. Electricty is created. 

SOLUTION: electricity ,electrons at the anode ,electrons at the cathode 

PROBLEM: Plants produce fruit which contain seeds of the plant. An animal eats the fruit from a plant. The animal digests the fruit. The seeds are not digested. The seeds pass through the animal's digestive system. The seeds are in the animal's droppings. The seeds are now in another location and can grow. 

SOLUTION:
fruit ,seed