Was a actor that M2 , M3 , and M4 were influenced by M1 's director and writer
SELECT count(*) WHERE {
?x0 a ns:film.actor .
?x0 ns:film.director.film M1 .
?x0 ns:film.writer.film M1 .
?x0 ns:influence.influence_node.influenced M2 .
?x0 ns:influence.influence_node.influenced M3 .
?x0 ns:influence.influence_node.influenced M4
}