What actor that M1 was influenced by and M2 was influenced by was a French child of M4
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.actor .
?x0 ns:influence.influence_node.influenced M1 .
?x0 ns:influence.influence_node.influenced M2 .
?x0 ns:people.person.nationality ns:m.0f8l9c .
?x0 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M4
}