Assert is a type of Behave. Walk is a type of Behave. Walk is related to Dance. Dance is related to Physical. 
Street is a type of Opportunity. you are likely to find Bicycle in/at/on Street. Bicycle is related to Ride. Ride is related to Bus. 
Assert --IsA--> Behave <--IsA-- Walk <--RelatedTo--> Dance <--RelatedTo--> Physical 
Opportunity <--IsA-- Street <--AtLocation-- Bicycle <--RelatedTo--> Ride <--RelatedTo--> Bus 