Did a British film director influence M1 , M2 , and M3 , influence M4 , and influence M6 's producer
SELECT count(*) WHERE {
?x0 a ns:film.director .
?x0 ns:influence.influence_node.influenced ?x1 .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced M2 .
?x0 ns:influence.influence_node.influenced M3 .
?x0 ns:influence.influence_node.influenced M4 .
?x0 ns:people.person.nationality ns:m.07ssc .
?x1 ns:film.producer.film|ns:film.production_company.films M6
}