Harmony is related to Peace. Peace is related to White. 
Stuff is related to Arm. Armed is derived from Arm. Armed is related to War. you are likely to find Knife in/at/on War. 
Harmony <--RelatedTo--> Peace <--RelatedTo--> White 
Stuff <--RelatedTo--> Arm <--DerivedFrom-- Armed <--RelatedTo--> War <--AtLocation-- Knife 