question: Were M1 and M2 influenced by a child of M0
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M0 .
  M1 ns:influence.influence_node.influenced_by ?x0 .
  M2 ns:influence.influence_node.influenced_by ?x0
  }