what is the {statement supported by} for {El Salvador} has {has quality} as {free country} ?
What were the statements made by El Salvador to support becoming a free country?
SELECT ?value WHERE { wd:Q792 p:P1552 ?s . ?s ps:P1552 wd:Q3174312 . ?s pq:P3680 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q792> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1552> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q3174312> .
?statement <http://www.wikidata.org/entity/P3680> ?value. 
} 

What statements did El Salvador make showing they wanted to become a free country?