Helicopter can be used for Transport. Transport is related to Horse. Horse is related to Cart. 
Birthday is related to Naked. Naked is related to Rat. Rat is a type of Pad. you are likely to find Pad in/at/on Planner. 
Helicopter --UsedFor--> Transport <--RelatedTo--> Horse <--RelatedTo--> Cart 
Birthday <--RelatedTo--> Naked <--RelatedTo--> Rat --IsA--> Pad --AtLocation--> Planner 