question: Who was employed by a company whose founder and employee married M3 , M4 , and M5 and founded M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:organization.organization_founder.organizations_founded M1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
  ?x1 a ns:business.employer .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
  ?x1 ns:organization.organization.founders ?x2 .
  ?x2 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses M3 .
  ?x2 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses M4 .
  ?x2 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses M5 .
  FILTER ( ?x2 != M3 ) .
  FILTER ( ?x2 != M4 ) .
  FILTER ( ?x2 != M5 )
  }