What was M0 's Mexican employee 's employer
SELECT DISTINCT ?x0 WHERE {
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x1 ns:people.person.nationality ns:m.0b90_r
}