Potential is related to Idea. Idea is related to Bulb. Bulb is a type of Part. 
Mild is the opposite of Hot. Hot is related to Very. Very is related to Joy. 
Potential <--RelatedTo--> Idea <--RelatedTo--> Bulb --IsA--> Part 
Mild <--Antonym--> Hot <--RelatedTo--> Very <--RelatedTo--> Joy 