How to load a GeoJSON into an ontology using DataFlow

Developing the English version of the following Spanish article: https://onesaitplatform.atlassian.net/wiki/pages/createpage.action?spaceKey=doct&title=C%C3%B3mo%20cargar%20un%20GeoJSON%20en%20una%20ontolog%C3%ADa%20mediante%20DataFlow&linkCreation=true&fromPageId=2220824453