Developing is related to Photograph. Photograph is a synonym of Snap. Snap is related to Finger. you are likely to find Cut in/at/on Finger. 
Mask is a type of Cover. Spread is a type of Cover. Spread is a type of Page. Page is related to Sheet. 
Developing <--RelatedTo--> Photograph <--Synonym--> Snap <--RelatedTo--> Finger <--AtLocation-- Cut 
Mask --IsA--> Cover <--IsA-- Spread --IsA--> Page <--RelatedTo--> Sheet 