you are likely to find Bench in/at/on Lawn. 
Desk is related to Equipment. Equipment can be used for Perform. you would Sing because Perform. Sing is related to Sign. 
Bench --AtLocation--> Lawn 
Desk <--RelatedTo--> Equipment --UsedFor--> Perform <--MotivatedByGoal-- Sing <--RelatedTo--> Sign 