Be is related to Let. Let is a synonym of Allow. Allow is a synonym of Appropriate. 
Summary is a type of Statement. Statement is a synonym of Expression. Expression is a synonym of Formula. Formula is a type of Milk. 
Be <--RelatedTo--> Let <--Synonym--> Allow <--Synonym--> Appropriate 
Summary --IsA--> Statement <--Synonym--> Expression <--Synonym--> Formula --IsA--> Milk 