Were M2 and M4 founded by a British actor and founded by M3
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:people.person.nationality ns:m.07ssc .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders M3 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders M3
}