Which institution has more than 19,020 students in london with a research funding of more than 7,734?
CREATE TABLE "members" (
  "institution" text,
  "location" text,
  "established" real,
  "gained_university_status" real,
  "vice_chancellor" text,
  "total_number_of_students" real,
  "research_funding_000" real
);
SELECT "institution" FROM "members" WHERE "total_number_of_students">'19,020' AND "location"='london' AND "research_funding_000">'7,734';