Basic is related to Bread. Bread is a type of Cover. Brush is a type of Cover. Brush is a type of Contact. 
Rate is related to Measurement. Measurement is related to Slope. Slope is related to Terrain. 
Basic <--RelatedTo--> Bread --IsA--> Cover <--IsA-- Brush --IsA--> Contact 
Rate <--RelatedTo--> Measurement <--RelatedTo--> Slope <--RelatedTo--> Terrain 