Which Investing Dragon has requested £100,000 and is supported by Entrepreneur Kay Russell?
CREATE TABLE "series_7" (
  "episode" text,
  "first_aired" text,
  "entrepreneur_s" text,
  "company_or_product_name" text,
  "money_requested" text,
  "investing_dragon_s" text
);
SELECT "investing_dragon_s" FROM "series_7" WHERE "money_requested"='100,000' AND "entrepreneur_s"='kay russell';