question: Which person whose parent was employed by and founded M2 and M3 executive produced M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:film.producer.films_executive_produced M1 .
  ?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x1 .
  ?x1 ns:organization.organization_founder.organizations_founded M2 .
  ?x1 ns:organization.organization_founder.organizations_founded M3 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M3
  }