Review is related to Film. Specialist is a type of Film. Specialist is similar to Expert. Observer is a type of Expert. 
Would is a type of Single. Single is the opposite of Pair. you are likely to find Leg in/at/on Pair. Leg is related to Part. 
Review <--RelatedTo--> Film <--IsA-- Specialist <--SimilarTo--> Expert <--IsA-- Observer 
Would --IsA--> Single <--Antonym--> Pair <--AtLocation-- Leg <--RelatedTo--> Part 