Dog wants (to) Dig. Dog have Nose. Nose is related to Hearing. Hearing is a type of Session. 
Acknowledge is similar to Recognize. Recognize is related to Remember. 
Dig <--Desires-- Dog --HasA--> Nose <--RelatedTo--> Hearing --IsA--> Session 
Acknowledge <--SimilarTo--> Recognize <--RelatedTo--> Remember 