Captain is a synonym of Supervisor. Supervisor is a synonym of Boss. you are likely to find Boss in/at/on Conference. Seminar is a type of Conference. 
Tunnel is related to Long. Long is related to Hall. Hallway is a type of Hall. 
Captain <--Synonym--> Supervisor <--Synonym--> Boss --AtLocation--> Conference <--IsA-- Seminar 
Tunnel <--RelatedTo--> Long <--RelatedTo--> Hall <--IsA-- Hallway 