Position is related to Wealth. Wealth is related to Lot. Lot is related to Square. Square is related to Side. 
Portion is related to Slice. Slice is a different concept from Good. Change can be Good. 
Position <--RelatedTo--> Wealth <--RelatedTo--> Lot <--RelatedTo--> Square <--RelatedTo--> Side 
Portion <--RelatedTo--> Slice <--DistinctFrom--> Good <--HasProperty-- Change 