the il turco in italia opera has how many librettists?
Value
1
class entity
opera.librettist m.05ssz1
opera.librettist opera.opera
Librettist Il turco in Italia
count none
opera.opera.librettist
Librettist
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (COUNT(?x0) AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :opera.librettist . 
VALUES ?x1 { :m.05ssz1 } 
?x1 :opera.opera.librettist ?x0 . 
FILTER ( ?x0 != ?x1  )
}
}
(COUNT (AND opera.librettist (JOIN (R opera.opera.librettist) m.05ssz1)))