Question: What incident occurred before the song writer wrote El Truco?
Answer(s):
answer: Gunshot

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:music.composer.compositions ns:m.05mvxcc . 
?c ns:base.disaster2.injured_person.injuries ?y .
?y ns:base.disaster2.injury.type_of_event ?x .
}