Question: Which Opponents have a Year of 1998–99, and a Team of Aston Villa?
SQL: SELECT "Opponents" FROM "2-15234969-4" WHERE "Year" = '1998–99' AND "Team" = 'Aston Villa';

Question: Which Score has Opponents of Valencia, and a Year of 2011–12?
SQL: SELECT "Score" FROM "2-15234969-4" WHERE "Opponents" = 'Valencia' AND "Year" = '2011–12';

Question: Which Opponents have a Team of Arsenal, and a Year of 1963–64?
SQL: SELECT "Opponents" FROM "2-15234969-4" WHERE "Team" = 'Arsenal' AND "Year" = '1963–64';

Question: Which Opponents have a Year of 1999–2000, and a Team of Leeds United?
SQL: SELECT "Opponents" FROM "2-15234969-4" WHERE "Year" = '1999–2000' AND "Team" = 'Leeds United';

Question: Which Opponents have a Score of 1–2, and a Team of Arsenal, and Progress of First round?
SQL: SELECT "Opponents" FROM "2-15234969-4" WHERE "Score" = '1–2' AND "Team" = 'Arsenal' AND "Progress" = 'First round';