HCL_FI_WATERAREA_MAJOR_SUBAREA.csv

URL: https://data.apps.fao.org/catalog/dataset/8bede48f-db4f-4ead-89bb-6d0f2ba2715b/resource/bf941a12-f6cc-4b29-9bd4-cac9aef99b4e/download/hcl_fi_waterarea_major_subarea.csv

Hierarchy - relation between Major and SubArea