Bolt is related to Strike. Striking is a form of Strike. Striking is related to Protest. Protest is related to Crowd. 
Pc is a type of Computer. Computer is related to Desk. Desk is related to Lamp. 
Bolt <--RelatedTo--> Strike <--FormOf-- Striking <--RelatedTo--> Protest <--RelatedTo--> Crowd 
Pc --IsA--> Computer <--RelatedTo--> Desk <--RelatedTo--> Lamp 