you are likely to find Snow in/at/on Roof. you are likely to find Water in/at/on Roof. you are likely to find Water in/at/on Spit. Spit is a synonym of Sprinkle. 
Little is related to Rice. 
Snow --AtLocation--> Roof <--AtLocation-- Water --AtLocation--> Spit <--Synonym--> Sprinkle 
Little <--RelatedTo--> Rice 