Did M2 , M5 , and M6 influence M3 , influence a British actor , and influence M4
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:people.person.nationality ns:m.07ssc .
M2 ns:influence.influence_node.influenced ?x0 .
M2 ns:influence.influence_node.influenced M3 .
M2 ns:influence.influence_node.influenced M4 .
M5 ns:influence.influence_node.influenced ?x0 .
M5 ns:influence.influence_node.influenced M3 .
M5 ns:influence.influence_node.influenced M4 .
M6 ns:influence.influence_node.influenced ?x0 .
M6 ns:influence.influence_node.influenced M3 .
M6 ns:influence.influence_node.influenced M4
}