Youth is related to Person. Person is related to Ordinary. Ordinary is a different concept from Unique. Unique is the opposite of Common. 
Trial is related to Elephant. Elephant is related to Date. Date is related to Specific. Specific is similar to Unique. 
Youth <--RelatedTo--> Person <--RelatedTo--> Ordinary <--DistinctFrom--> Unique <--Antonym--> Common 
Trial <--RelatedTo--> Elephant <--RelatedTo--> Date <--RelatedTo--> Specific <--SimilarTo--> Unique 