What is the Australian open in 2010?
CREATE TABLE "federer_nadal_grand_slam_era" (
  "year" real,
  "australian_open" text,
  "french_open" text,
  "wimbledon" text,
  "us_open" text
);
SELECT "australian_open" FROM "federer_nadal_grand_slam_era" WHERE "year"=2010;