Agent is a type of Substance. Vehicle is a type of Substance. Vehicle is related to Gas. 
Community is a synonym of People. People can be used for Help. Help is a synonym of Assistant. Assistant is a synonym of Supporter. 
Agent --IsA--> Substance <--IsA-- Vehicle <--RelatedTo--> Gas 
Community <--Synonym--> People --UsedFor--> Help <--Synonym--> Assistant <--Synonym--> Supporter 