Electric is related to Charge. Charge is related to Run. Run is a type of Leave. 
Ground is a type of Reach. you are likely to find Pond in/at/on Ground. Mere is a type of Pond. 
Electric <--RelatedTo--> Charge <--RelatedTo--> Run --IsA--> Leave 
Reach <--IsA-- Ground <--AtLocation-- Pond <--IsA-- Mere 