Was a sibling of a employee of a person 's country of nationality M1
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 ^ns:people.person.nationality ?x2 .
?x2 a ns:people.person .
FILTER ( M1 != ?x0 ) .
M1 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings ?x0
}