question: Who was influenced by a character that M3 influenced and was influenced by M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x1 a ns:fictional_universe.fictional_character .
  ?x1 ns:influence.influence_node.influenced_by M3
  }