Question: Which leagues entered in rounds where there were 16 winners from the previous round?
SQL: SELECT "Leagues entering at this round" FROM "1-23449363-1" WHERE "Winners from previous round" = '16';

Question: Which rounds had 32 clubs involved?
SQL: SELECT "Round" FROM "1-23449363-1" WHERE "Clubs involved" = 32.0;

Question: Which round had 24 new entries?
SQL: SELECT "Round" FROM "1-23449363-1" WHERE "New entries this round" = '24';

Question: Which leagues entered an Extra Preliminary Round?
SQL: SELECT "Leagues entering at this round" FROM "1-23449363-1" WHERE "Round" = 'Extra Preliminary Round';