Vocal is related to Laugh. Laugh is a different concept from Cry. Cry is related to Related. Related is related to Month. 
People is related to Society. Society is related to Class. 
Vocal <--RelatedTo--> Laugh <--DistinctFrom--> Cry <--RelatedTo--> Related <--RelatedTo--> Month 
People <--RelatedTo--> Society <--RelatedTo--> Class 