Was M2 a production company whose employee was influenced by M0 and M1
SELECT count(*) WHERE {
?x0 ns:influence.influence_node.influenced_by M0 .
?x0 ns:influence.influence_node.influenced_by M1 .
M2 a ns:film.production_company .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}