Door is related to Element. Fire is a type of Element. Fire is related to Ready. 
History is related to Long. Long is related to Foot. Foot is related to Myth. Myth is related to Greek. 
Door <--RelatedTo--> Element <--IsA-- Fire <--RelatedTo--> Ready 
History <--RelatedTo--> Long <--RelatedTo--> Foot <--RelatedTo--> Myth <--RelatedTo--> Greek 