Take is related to Pain. Pain is related to Terrible. Terrible is the opposite of Perfect. 
Required is related to Cost. Cost is related to Unit. Unit is related to Age. Age is related to Annual. 
Take <--RelatedTo--> Pain <--RelatedTo--> Terrible <--Antonym--> Perfect 
Required <--RelatedTo--> Cost <--RelatedTo--> Unit <--RelatedTo--> Age <--RelatedTo--> Annual 