question: Which writer of M0 influenced and was influenced by M1 , M2 , M3 , and M4
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.writer.film M0 .
  ?x0 ns:influence.influence_node.influenced M1 .
  ?x0 ns:influence.influence_node.influenced M2 .
  ?x0 ns:influence.influence_node.influenced M3 .
  ?x0 ns:influence.influence_node.influenced M4 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x0 ns:influence.influence_node.influenced_by M3 .
  ?x0 ns:influence.influence_node.influenced_by M4
  }