Was M4 a company whose employee was employed by M0 and M1 , was employed by M2 , and founded M3
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M4 a ns:business.employer .
M4 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}