Did a company employ M1 , employ M2 , and employ a company 's founder
SELECT count(*) WHERE {
?x0 a ns:business.employer .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
?x1 ns:organization.organization_founder.organizations_founded ?x2 .
?x2 a ns:business.employer
}