Disability is related to Blind. Blind is related to Sight. Sight is related to Visual. Visual is related to Picture. 
Debate is related to Argue. Argue is a synonym of Contend. 
Disability <--RelatedTo--> Blind <--RelatedTo--> Sight <--RelatedTo--> Visual <--RelatedTo--> Picture 
Debate <--RelatedTo--> Argue <--Synonym--> Contend 