Were M3 and M4 founded by M1 's founder 's employer 's British founder and founded by M2 's star
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded ?x1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 ns:organization.organization_founder.organizations_founded M1 .
?x3 ns:film.actor.film/ns:film.performance.film M2 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x3 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x3
}