Which employer of M0 did a company 's employee found
SELECT DISTINCT ?x0 WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
?x0 ns:organization.organization.founders ?x1 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
?x2 a ns:business.employer
}