Was M0 M3 's Mexican British parent
SELECT count(*) WHERE {
M0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M3 .
M0 ns:people.person.nationality ns:m.07ssc .
M0 ns:people.person.nationality ns:m.0b90_r
}