CREATE TABLE "a_b_second_round" (
  "time" text,
  "home_team" text,
  "score" text,
  "away_team" text,
  "venue" text
);

Question: Who was the away team for the match with a home team of Citizen Team A?
SQL: SELECT "away_team" FROM "a_b_second_round" WHERE "home_team"='citizen team a';

Question: What was the score for the match with a home team of Citizen Team A?
SQL: SELECT "score" FROM "a_b_second_round" WHERE "home_team"='citizen team a';

Question: Who was the home team in the match that had an away team of Convoy Sun Hei Team B?
SQL: SELECT "home_team" FROM "a_b_second_round" WHERE "away_team"='convoy sun hei team b';

Question: What time did the match with an away team of Happy Valley Team B start?
SQL: SELECT "time" FROM "a_b_second_round" WHERE "away_team"='happy valley team b';