Cast is a type of Gathering. Gathering is related to Cloud. Cloud is related to Appearance. 
Dock is related to Parking. Space can be used for Parking. Space is a synonym of Place. Place is related to Wage. 
Cast --IsA--> Gathering <--RelatedTo--> Cloud <--RelatedTo--> Appearance 
Dock <--RelatedTo--> Parking <--UsedFor-- Space <--Synonym--> Place <--RelatedTo--> Wage 