Were M3 and M4 founded by a film producer and founded by M1 's British parent
SELECT count(*) WHERE {
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M1 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 a ns:film.producer .
M3 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x1 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x1
}