question: Was M1 's employee 's American sibling influenced by a person
query: SELECT count(*) WHERE {
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:people.person.nationality ns:m.09c7w0 .
  ?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x2 .
  ?x1 a ns:people.person .
  ?x2 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  FILTER ( ?x0 != ?x2 )
  }