Was a film editor influenced by M1 and influenced by a British editor of M3
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x1 ns:film.editor.film M3 .
?x1 ns:people.person.nationality ns:m.07ssc
}