What's the Wednesday, June 1 practice time for the rider that did 21' 05.87 107.300mph on Thursday, June 2?
CREATE TABLE "practice_times_and_leaderboard_600cc" (
  "rank" real,
  "rider" text,
  "mon_30_may" text,
  "tues_31_may" text,
  "wed_1_june" text,
  "thurs_2_june" text,
  "fri_3_june" text
);
SELECT "wed_1_june" FROM "practice_times_and_leaderboard_600cc" WHERE "thurs_2_june"='21'' 05.87 107.300mph';