question: Was a actor that was influenced by M2 and M3 and was influenced by M4 , M5 , and M6 M0
query: SELECT count(*) WHERE {
  M0 a ns:film.actor .
  M0 ns:influence.influence_node.influenced_by M2 .
  M0 ns:influence.influence_node.influenced_by M3 .
  M0 ns:influence.influence_node.influenced_by M4 .
  M0 ns:influence.influence_node.influenced_by M5 .
  M0 ns:influence.influence_node.influenced_by M6
  }