Did M3 influence a character , marry a person , influence M4 , and marry M2 's writer
SELECT count(*) WHERE {
?x0 a ns:fictional_universe.fictional_character .
?x1 a ns:people.person .
?x2 ns:film.writer.film M2 .
FILTER ( M3 != ?x1 ) .
FILTER ( M3 != ?x2 ) .
M3 ns:influence.influence_node.influenced ?x0 .
M3 ns:influence.influence_node.influenced M4 .
M3 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x1 .
M3 ns:people.person.spouse_s/ns:people.marriage.spouse|ns:fictional_universe.fictional_character.married_to/ns:fictional_universe.marriage_of_fictional_characters.spouses ?x2
}