Was a person influenced by M1 and M2 and influenced by a costume designer of M3 and M4
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:influence.influence_node.influenced_by ?x1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:influence.influence_node.influenced_by M2 .
?x1 ns:film.film_costumer_designer.costume_design_for_film M3 .
?x1 ns:film.film_costumer_designer.costume_design_for_film M4
}