CREATE TABLE "table1_24798489_2" (
  "episode_number" real,
  "location" text,
  "original_airdate" text,
  "challenge_winner" text,
  "challenge" text
);

Question: What location did the episode that aired originally on August 26, 2009 take place at?
SQL: SELECT "location" FROM "table1_24798489_2" WHERE "original_airdate"='August 26, 2009';

Question: How many dates originally aired episodes located in Philadelphia, pennsylvania?
SQL: SELECT COUNT("original_airdate") FROM "table1_24798489_2" WHERE "location"='Philadelphia, Pennsylvania';

Question: What was the challenge for episode 28?
SQL: SELECT "challenge" FROM "table1_24798489_2" WHERE "episode_number"=28;

Question: How many original air dates were there for episode 22?
SQL: SELECT COUNT("original_airdate") FROM "table1_24798489_2" WHERE "episode_number"=22;