Clear is related to Action. 
you are likely to find Mouse in/at/on Lab. you are likely to find Mouse in/at/on Hole. Hole is related to Sock. you are likely to find Sock in/at/on House. 
Clear <--RelatedTo--> Action 
Lab <--AtLocation-- Mouse --AtLocation--> Hole <--RelatedTo--> Sock --AtLocation--> House 