URL: https://data.apps.fao.org/catalog/dataset/8bede48f-db4f-4ead-89bb-6d0f2ba2715b/resource/faea0b2f-95f2-45cd-8bc1-a70dd4a21a7c/download/hcl_fi_waterarea_subdivision_subunit.csv
Hierarchy - relation between SubDivision and SubUnit
