Apparent is a synonym of Clear. Communicate requires Clear. one thing you do when you Teach is Communicate. Coach is a type of Teach. 
Background is related to Noise. Noise is related to Make. 
Apparent <--Synonym--> Clear <--HasPrerequisite-- Communicate <--HasSubevent-- Teach <--IsA-- Coach 
Background <--RelatedTo--> Noise <--RelatedTo--> Make 