What character that M1 employed did M2 and M3 influence
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:influence.influence_node.influenced_by M2 .
?x0 ns:influence.influence_node.influenced_by M3 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1
}