Gate is related to Yard. Yard is related to Year. Year is a different concept from Second. 
Sad is related to Feel. Feel is related to Emotional. Emotional is related to Laugh. Laugh is related to Humor. 
Gate <--RelatedTo--> Yard <--RelatedTo--> Year <--DistinctFrom--> Second 
Sad <--RelatedTo--> Feel <--RelatedTo--> Emotional <--RelatedTo--> Laugh <--RelatedTo--> Humor 