Who was employed by a British person 's country of nationality and employed by M1 and M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x1 ^ns:people.person.nationality ?x2 .
?x2 a ns:people.person .
?x2 ns:people.person.nationality ns:m.07ssc
}