Struggle is a synonym of Contest. Chicken is a type of Contest. Chicken is related to Protein. Meat have Protein. 
Scream is related to Movie. you are likely to find Music in/at/on Movie. Music is related to Listen. 
Struggle <--Synonym--> Contest <--IsA-- Chicken <--RelatedTo--> Protein <--HasA-- Meat 
Scream <--RelatedTo--> Movie <--AtLocation-- Music <--RelatedTo--> Listen 