Spot is related to Bed. Bed is related to Blanket. you are likely to find Blanket in/at/on Bedroom. Bedroom is related to House. 
Sphere is related to Round. Round is related to Twist. Twist is related to Rock. Rock is the opposite of Plant. 
Spot <--RelatedTo--> Bed <--RelatedTo--> Blanket --AtLocation--> Bedroom <--RelatedTo--> House 
Sphere <--RelatedTo--> Round <--RelatedTo--> Twist <--RelatedTo--> Rock <--Antonym--> Plant 