Big is related to Very. Very is related to Large. Large is related to River. Angel is a type of River. 
Killing can be Bad. Killing can cause/lead to Investigation. Investigation is related to Work. 
Big <--RelatedTo--> Very <--RelatedTo--> Large <--RelatedTo--> River <--IsA-- Angel 
Bad <--HasProperty-- Killing --Causes--> Investigation <--RelatedTo--> Work 