Envision is derived from Vision. Vision is related to Color. Color is related to Apple. 
Film is a type of Sheet. Specialist is a type of Film. you are likely to find Specialist in/at/on Conference. you are likely to find Vendor in/at/on Conference. 
Envision --DerivedFrom--> Vision <--RelatedTo--> Color <--RelatedTo--> Apple 
Sheet <--IsA-- Film <--IsA-- Specialist --AtLocation--> Conference <--AtLocation-- Vendor 