Affair is related to Sleep. Sleep is related to Closed. Closed is similar to Union. Union is related to Civil. 
Distinguish is related to Famous. Famous is related to Be. 
Affair <--RelatedTo--> Sleep <--RelatedTo--> Closed <--SimilarTo--> Union <--RelatedTo--> Civil 
Distinguish <--RelatedTo--> Famous <--RelatedTo--> Be 