Elderly is related to Age. Age is related to Annual. 
Unable is the opposite of Able. Disabled is derived from Able. Person does not want (to) Disabled. Person is related to Scholar. 
Elderly <--RelatedTo--> Age <--RelatedTo--> Annual 
Unable <--Antonym--> Able <--DerivedFrom-- Disabled <--NotDesires-- Person <--RelatedTo--> Scholar 