URL: https://data.apps.fao.org/catalog/dataset/338d9dfb-be42-4ae1-adf2-07a0e64c9f0b/resource/0f47401b-b0eb-457c-b455-054ee6db4b91/download/hcl_cwp_gearl1_gearl2.csv
Hierarchy - relation between Level 1 and Level 2 of fishing gears
