Concerned is a synonym of Anxious. Anxious is a synonym of Dying. Dying can cause/lead to End. 
Color is related to Pale. Pale is related to White. White is related to Sock. 
Concerned <--Synonym--> Anxious <--Synonym--> Dying --Causes--> End 
Color <--RelatedTo--> Pale <--RelatedTo--> White <--RelatedTo--> Sock 