Activity is related to Join. Join is related to Union. Union is similar to Closed. 
Grass is related to Fresh. Fresh is related to Refrigerator. you are likely to find Refrigerator in/at/on House. 
Activity <--RelatedTo--> Join <--RelatedTo--> Union <--SimilarTo--> Closed 
Grass <--RelatedTo--> Fresh <--RelatedTo--> Refrigerator --AtLocation--> House 