Table: croatian_cup_2007_08
Columns: round
main_date
number_of_fixtures
clubs
new_entries_this_round

Question: What is the Clubs when there are 4 for the number of fixtures?
SQL: SELECT "clubs" FROM croatian_cup_2007_08 WHERE "number_of_fixtures" = 4

Question: What is the sum of Number of fixtures when the rounds shows quarter-finals?
SQL: SELECT SUM("number_of_fixtures") FROM croatian_cup_2007_08 WHERE "round" = 'quarter-finals'

Question: What is the New entries this round when the round is the semi-finals?
SQL: SELECT "new_entries_this_round" FROM croatian_cup_2007_08 WHERE "round" = 'semi-finals'

Question: What is the Round when the number of fixtures is more than 2, and the Main date of 7 and 28 november 2007?
SQL: SELECT "round" FROM croatian_cup_2007_08 WHERE "number_of_fixtures" > 2 AND "main_date" = '7 and 28 november 2007'