Table: czech_cup_2008_09
Columns: round
clubs_remaining
clubs_involved
winners_from_previous_round
new_entries_this_round
leagues_entering_this_round

Question: Name the least clubs involved for leagues being none for semi finals
SQL: SELECT MIN("clubs_involved") FROM czech_cup_2008_09 WHERE "leagues_entering_this_round" = 'none' AND "round" = 'Semi finals'

Question: Name the new entries this round for third round
SQL: SELECT "new_entries_this_round" FROM czech_cup_2008_09 WHERE "round" = 'Third round'

Question: Name the leagues entering this round for 4
SQL: SELECT "leagues_entering_this_round" FROM czech_cup_2008_09 WHERE "clubs_involved" = 4

Question: Name the least clubs remaining
SQL: SELECT MIN("clubs_remaining") FROM czech_cup_2008_09