question: Did M3 employ a sibling of a person and employ M1 's Chinese spouse
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.0d05w3 .
  ?x0 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses M1 .
  ?x1 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 .
  ?x2 a ns:people.person .
  FILTER ( ?x0 != M1 ) .
  FILTER ( ?x1 != ?x2 ) .
  M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
  }