Was M1 a company that was founded by M3 and employed M0 's founder
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded M0 .
M1 a ns:business.employer .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M1 ns:organization.organization.founders M3
}