Electronics is related to Charge. Charge is related to Negative. Film can be used for Negative. 
Disabled is a type of People. Disabled is derived from Able. Able is similar to Capable. 
Electronics <--RelatedTo--> Charge <--RelatedTo--> Negative <--UsedFor-- Film 
People <--IsA-- Disabled --DerivedFrom--> Able <--SimilarTo--> Capable 