Stair is related to Part. Half is a type of Part. Half is related to Measurement. Measurement is related to Generation. 
Tobacco is related to Ingredient. Ingredient is related to Color. 
Stair <--RelatedTo--> Part <--IsA-- Half <--RelatedTo--> Measurement <--RelatedTo--> Generation 
Tobacco <--RelatedTo--> Ingredient <--RelatedTo--> Color 