CREATE TABLE "episode_events" (
  "episode_number" real,
  "air_date" text,
  "event_1" text,
  "event_2" text,
  "event_3" text,
  "event_4" text
);

Question: On what date was the episode aired where event 2 was Hang Tough?
SQL: SELECT "air_date" FROM "episode_events" WHERE "event_2"='Hang Tough';

Question: When event 4 was Whiplash, what was event 2?
SQL: SELECT "event_2" FROM "episode_events" WHERE "event_4"='Whiplash';

Question: On how many different dates was event 1 Suspension Bridge?
SQL: SELECT COUNT("air_date") FROM "episode_events" WHERE "event_1"='Suspension Bridge';

Question: On which episode number is event 4 The Wall and event 1 the Pendulum?
SQL: SELECT COUNT("episode_number") FROM "episode_events" WHERE "event_4"='The Wall' AND "event_1"='Pendulum';

Question: What was event 2 when event 1 was Atlasphere?
SQL: SELECT "event_2" FROM "episode_events" WHERE "event_1"='Atlasphere';