Passenger is related to Elevator. you are likely to find Elevator in/at/on Building. Building is related to Roof. Roof is the opposite of Floor. 
Sake is a synonym of Interest. Interest is related to Saving. Saving is a synonym of Rescue. 
Passenger <--RelatedTo--> Elevator --AtLocation--> Building <--RelatedTo--> Roof <--Antonym--> Floor 
Sake <--Synonym--> Interest <--RelatedTo--> Saving <--Synonym--> Rescue 