Letter is related to Individual. Individual is related to Separate. Tear is a type of Separate. 
Ice is related to Clear. Clear is related to Sense. Sense is related to Shade. Shade is a different concept from Burning. 
Letter <--RelatedTo--> Individual <--RelatedTo--> Separate <--IsA-- Tear 
Ice <--RelatedTo--> Clear <--RelatedTo--> Sense <--RelatedTo--> Shade <--DistinctFrom--> Burning 