Difficulty is a type of Condition. Stress is a type of Difficulty. Stress is a synonym of Emphasis. Emphasis is a synonym of Accent. 
Check is a type of Draft. Check is a type of Analyze. View is a type of Analyze. View is related to Picture. 
Condition <--IsA-- Difficulty <--IsA-- Stress <--Synonym--> Emphasis <--Synonym--> Accent 
Draft <--IsA-- Check --IsA--> Analyze <--IsA-- View <--RelatedTo--> Picture 