question: Was M1 influenced by M2 , M3 , and M4 , influenced by M5 and M6 , and influenced by a person
query: SELECT count(*) WHERE {
  ?x0 a ns:people.person .
  M1 ns:influence.influence_node.influenced_by ?x0 .
  M1 ns:influence.influence_node.influenced_by M2 .
  M1 ns:influence.influence_node.influenced_by M3 .
  M1 ns:influence.influence_node.influenced_by M4 .
  M1 ns:influence.influence_node.influenced_by M5 .
  M1 ns:influence.influence_node.influenced_by M6
  }