Burden is related to Horse. Horse is related to Bit. 
Guidance is a type of Message. Guidance is related to Coach. Coach is related to Trainer. Trainer is a type of Worker. 
Burden <--RelatedTo--> Horse <--RelatedTo--> Bit 
Message <--IsA-- Guidance <--RelatedTo--> Coach <--RelatedTo--> Trainer --IsA--> Worker 