What percent of others did ogm/news count when MARTIN had 9%?
CREATE TABLE "opinion_polls" (
  "source" text,
  "date" text,
  "martin" text,
  "gr_ne" text,
  "others" text,
  "undecided" text
);
SELECT "others" FROM "opinion_polls" WHERE "martin"='9%' AND "source"='ogm/news';