question: What's the Wednesday, June 1 practice time for the rider that did 21' 05.87 107.300mph on Thursday, June 2?
answer: SELECT wed_1_june FROM table_29218221_3 WHERE thurs_2_june = "21' 05.87 107.300mph"
context: CREATE TABLE table_29218221_3 (wed_1_june VARCHAR, thurs_2_june VARCHAR)