Was a writer of M1 , M2 , M3 , M4 , and M5 a character
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:film.writer.film M4 .
?x0 ns:film.writer.film M5
}