question: Was a film producer influenced by a director , writer , and editor of M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x1 ns:film.director.film M1 .
  ?x1 ns:film.editor.film M1 .
  ?x1 ns:film.writer.film M1
  }