Job is related to Harvest. Machine can be used for Harvest. Machine is a synonym of Box. 
Expression is similar to Phrase. Phrase is a type of Construction. Construction is related to Bridge. 
Job <--RelatedTo--> Harvest <--UsedFor-- Machine <--Synonym--> Box 
Expression <--SimilarTo--> Phrase --IsA--> Construction <--RelatedTo--> Bridge 