Envision is a synonym of Vision. Vision is related to Blind. 
you are likely to find Computer in/at/on Library. Library is related to Structure. Structure is related to Object. Sphere is a type of Object. 
Envision <--Synonym--> Vision <--RelatedTo--> Blind 
Computer --AtLocation--> Library <--RelatedTo--> Structure <--RelatedTo--> Object <--IsA-- Sphere 