Was M1 a character employed by M3 and employed by a company
SELECT count(*) WHERE {
?x0 a ns:business.employer .
M1 a ns:fictional_universe.fictional_character .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M1 ns:people.person.employment_history/ns:business.employment_tenure.company M3
}