Were M3 and M4 founded by a film editor that founded M2 and founded by a person
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 a ns:film.editor .
?x1 ns:organization.organization_founder.organizations_founded M2 .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x1 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x1
}