Table: football_clubs_international
Columns: year
team
progress
score
opponents

Question: Which Opponents have a Year of 1998–99, and a Team of aston villa?
SQL: SELECT "opponents" FROM football_clubs_international 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 football_clubs_international 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 football_clubs_international 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 football_clubs_international 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 football_clubs_international WHERE "score" = '1–2' AND "team" = 'arsenal' AND "progress" = 'first round'