Did M2 employ M3 and employ a character that M1 employed
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M3
}