Visitor is a type of Person. Visitor is related to Guest. 
Construct is related to Word. Word is related to Text. Text is related to Sign. Sign is related to Protest. 
Person <--IsA-- Visitor <--RelatedTo--> Guest 
Construct <--RelatedTo--> Word <--RelatedTo--> Text <--RelatedTo--> Sign <--RelatedTo--> Protest 