Learn requires Concentrate. 
Bother is a type of Confuse. Distract is a type of Confuse. Distract is a synonym of Disturb. Disturb is a synonym of Disorder. 
Concentrate <--HasPrerequisite-- Learn 
Bother --IsA--> Confuse <--IsA-- Distract <--Synonym--> Disturb <--Synonym--> Disorder 