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. 

Q: The oil is extracted either onshore or offshore by large oil rigs. Crude oil is transported to a refinery. The refinery turns the crude oil into gasoline. The gasoline is loaded onto tank trucks. The tank trucks go to gas stations all over the place. The gasoline is delivered to the gas station. 

A: oil ,gasoline 
****
Q: 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. 

A: mold spore ; spore ; mold ,colony ; sporangiophores 
****
Q: You speak into the receiver on your phone. Sound waves move parts inside the receiver. Movement causes the magnet inside to produce eletricity. Electricity is transferred through  a wire or cable. A membrane in the other persons phone is vibrated by the magnet in their telephone. Sound is produced. They hear you. 

A:
Speak ,Sound Waves ,Electricity ,Sound 
****