Settlement is related to Small. Small is related to Part. Part is related to Cell. Cell is related to Charge. 
Mixture is related to Blend. Blend is a type of Combination. 
Settlement <--RelatedTo--> Small <--RelatedTo--> Part <--RelatedTo--> Cell <--RelatedTo--> Charge 
Mixture <--RelatedTo--> Blend --IsA--> Combination 