Was M3 influenced by a German screenwriter , influenced by a film editor , and influenced by M4
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x1 a ns:film.writer .
?x1 ns:people.person.nationality ns:m.0345h .
M3 ns:influence.influence_node.influenced_by ?x0 .
M3 ns:influence.influence_node.influenced_by ?x1 .
M3 ns:influence.influence_node.influenced_by M4
}