CREATE TABLE "men" (
  "year" real,
  "grand_slam" text,
  "round" text,
  "winner" text,
  "loser" text
);

Question: What was the round in 1968?
SQL: SELECT "round" FROM "men" WHERE "year"=1968;

Question: What is the round for a year earlier than 1987?
SQL: SELECT "round" FROM "men" WHERE "year"<1987;

Question: What is the round when Grand Slam was the Davis Cup?
SQL: SELECT "round" FROM "men" WHERE "grand_slam"='davis cup';

Question: What is the grand slam in 1987, when round shows first round, and Ivan Lendl won?
SQL: SELECT "grand_slam" FROM "men" WHERE "year"=1987 AND "round"='first round' AND "winner"='ivan lendl';