Would is a type of Single. Echo is a type of Single. 
Involved is related to Breath. Breath is related to Activity. Activity is related to Fly. Arrow can be used for Fly. 
Would --IsA--> Single <--IsA-- Echo 
Involved <--RelatedTo--> Breath <--RelatedTo--> Activity <--RelatedTo--> Fly <--UsedFor-- Arrow 