Was a cinematographer a person that influenced M2 , M3 , and M4
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced M2 .
?x0 ns:influence.influence_node.influenced M3 .
?x0 ns:influence.influence_node.influenced M4
}