Was M4 a actor whose British sibling edited M0 and wrote M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.editor.film M0 .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:people.person.nationality ns:m.07ssc .
FILTER ( M4 != ?x0 ) .
M4 a ns:film.actor .
M4 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
}