CREATE TABLE "final" (
  "place" real,
  "lane" real,
  "name" text,
  "nationality" text,
  "50m_split" real,
  "100m_split" text,
  "150m_split" text,
  "time" text
);

Question: Which nationality has a split in the 50m of 29.51?
SQL: SELECT "nationality" FROM "final" WHERE "50m_split"=29.51;

Question: Which average 50m split had a 150m split of 1:40.00, with a placing of less than 2?
SQL: SELECT AVG("50m_split") FROM "final" WHERE "150m_split"='1:40.00' AND "place"<2;