But do not know if the version I downloaded contains only the Ontology Sumo or other manufacturer's components like Dbpedia, FOAF and other Ontologies that are in sumo.
The principle of linked data is to make links between concepts. The aim of an ontology is, based on experts consensus, to define concepts and their properties which are represented by links between URI's on machine language.
If SUMO have links like Dbpedia, FOAF, etc. means that there are no need to redefine the things that already exists on those ontologies.