Lens can be used for Telescope. Lens is related to Glass. Glass is related to Clear. 
List is a type of Move. List is related to Test. Test is related to Experiment. 
Telescope <--UsedFor-- Lens <--RelatedTo--> Glass <--RelatedTo--> Clear 
Move <--IsA-- List <--RelatedTo--> Test <--RelatedTo--> Experiment 