What is the largest amount of wins that was before the 2007 season, as well as the Team being silverstone motorsport academy?
CREATE TABLE "career_summary" (
  "season" real,
  "series" text,
  "team" text,
  "races" real,
  "wins" real,
  "poles" real,
  "podiums" real
);
SELECT MAX("wins") FROM "career_summary" WHERE "season"<2007 AND "team"='silverstone motorsport academy';