Who won the US Open in 1937?
CREATE TABLE "men_s_singles" (
  "num" real,
  "player" text,
  "age" real,
  "australian_open" real,
  "french_open" real,
  "wimbledon" real,
  "us_open" real
);
SELECT "player" FROM "men_s_singles" WHERE "us_open"=1937;