Phrase is part of Sentence. Phrase is a type of Passage. Passage can be used for Description. 
Landing is a form of Land. Land is related to Dock. Dock is a type of Herb. Herb is related to Natural. 
Sentence <--PartOf-- Phrase --IsA--> Passage --UsedFor--> Description 
Landing --FormOf--> Land <--RelatedTo--> Dock --IsA--> Herb <--RelatedTo--> Natural 