Did M1 employ a person 's parent
SELECT count(*) WHERE {
?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
?x1 a ns:people.person .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}