If Tuesday 1 June is 20' 59.60 107.834mph, what is the rank maximum?
CREATE TABLE "practice_times_and_leaderboard_600cc" (
  "rank" real,
  "rider" text,
  "sat_29_may" text,
  "mon_31_may" text,
  "tues_1_june" text,
  "wed_2_june" text,
  "thurs_3_june" text,
  "fri_4_june" text
);
SELECT MAX("rank") FROM "practice_times_and_leaderboard_600cc" WHERE "tues_1_june"='20'' 59.60 107.834mph';