Which screenwriter that M1 influenced and was influenced by was employed by M2 and employed by M3 and M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.writer .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced_by M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M4
}