Glove is related to Punch. Punch is a type of Magazine. Encounter is a type of Magazine. 
Sign is a type of Evidence. Sign is related to Public. Public is related to People. you are likely to find People in/at/on Opera. 
Glove <--RelatedTo--> Punch --IsA--> Magazine <--IsA-- Encounter 
Evidence <--IsA-- Sign <--RelatedTo--> Public <--RelatedTo--> People --AtLocation--> Opera 