Did a costume designer that M1 and M2 were influenced by play M3
SELECT count(*) WHERE {
?x0 a ns:film.film_costumer_designer .
?x0 ns:film.actor.film/ns:film.performance.character M3 .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced M2
}