CREATE TABLE "calendar" (
  "round" real,
  "date" text,
  "city_and_venue" text,
  "winner" text,
  "runner_up" text,
  "3rd_placed" text,
  "4th_placed" text,
  "results" text
);

Question: How many runner-ups when Jason Crump placed 3rd?
SQL: SELECT COUNT("runner_up") FROM "calendar" WHERE "3rd_placed"='Jason Crump';

Question: Where did Grzegorz Walasek place 4th?
SQL: SELECT "city_and_venue" FROM "calendar" WHERE "4th_placed"='Grzegorz Walasek';

Question: Who came in 3rd place in Krško , Slovenia Matije Gubca Stadium
SQL: SELECT "3rd_placed" FROM "calendar" WHERE "city_and_venue"='Krško , Slovenia Matije Gubca Stadium';

Question: How many placed 4th on April 25?
SQL: SELECT COUNT("4th_placed") FROM "calendar" WHERE "date"='April 25';