Were M1 and M5 founded by M2 , M3 , and M4 and founded by a company 's founder
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded ?x1 .
?x1 a ns:business.employer .
M1 ns:organization.organization.founders ?x0 .
M1 ns:organization.organization.founders M2 .
M1 ns:organization.organization.founders M3 .
M1 ns:organization.organization.founders M4 .
M5 ns:organization.organization.founders ?x0 .
M5 ns:organization.organization.founders M2 .
M5 ns:organization.organization.founders M3 .
M5 ns:organization.organization.founders M4
}