Who founded M3 , M4 , M5 , M6 , and M7 , was employed by M1 , and was employed by M2
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:organization.organization_founder.organizations_founded M3 .
?x0 ns:organization.organization_founder.organizations_founded M4 .
?x0 ns:organization.organization_founder.organizations_founded M5 .
?x0 ns:organization.organization_founder.organizations_founded M6 .
?x0 ns:organization.organization_founder.organizations_founded M7 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2
}