Metal is related to Helmet. Helmet is related to Construction. Construction is the opposite of Ruin. 
Drawing is a type of Representation. Frame is a type of Drawing. Frame is a type of Plan. 
Metal <--RelatedTo--> Helmet <--RelatedTo--> Construction <--Antonym--> Ruin 
Representation <--IsA-- Drawing <--IsA-- Frame --IsA--> Plan 