Was M3 edited by a British founder of M0 and M1
SELECT count(*) WHERE {
?x0 ns:organization.organization_founder.organizations_founded M0 .
?x0 ns:organization.organization_founder.organizations_founded M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
M3 ns:film.film.edited_by ?x0
}