Forest is related to Prevent. Prevent is related to Hide. Hide is related to Protect. Protect is related to Look. 
Metal is related to Positive. Positive is a type of Film. Accusation is a type of Film. Allegation is a type of Accusation. 
Forest <--RelatedTo--> Prevent <--RelatedTo--> Hide <--RelatedTo--> Protect <--RelatedTo--> Look 
Metal <--RelatedTo--> Positive --IsA--> Film <--IsA-- Accusation <--IsA-- Allegation 