what family founded rollo?
Entity
m.083jlw
House of Normandy
class entity
people.family m.0bp2m
people.family people.family_member
Family Rollo
none none
people.family.founder
Founder
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 (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :people.family . 
VALUES ?x1 { :m.0bp2m } 
?x0 :people.family.founder ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND people.family (JOIN people.family.founder m.0bp2m))