Bank is related to Hostage. Hostage is related to Victim. Victim is related to Assault. 
Potential is related to Floor. Floor is related to Surface. Surface is related to Wall. 
Bank <--RelatedTo--> Hostage <--RelatedTo--> Victim <--RelatedTo--> Assault 
Potential <--RelatedTo--> Floor <--RelatedTo--> Surface <--RelatedTo--> Wall 