Pc is related to Apple. Apple can be Green. Green is a different concept from Yellow. Yellow is related to Address. 
Mine is related to Coal. Coal is related to Rain. Rain is related to Condition. Condition is related to Fog. 
Pc <--RelatedTo--> Apple --HasProperty--> Green <--DistinctFrom--> Yellow <--RelatedTo--> Address 
Mine <--RelatedTo--> Coal <--RelatedTo--> Rain <--RelatedTo--> Condition <--RelatedTo--> Fog 