Table: bislett_athletes_2
Columns: event
record
athlete
nationality
date

Question: What is the record for Norway on 23 august 1981?
SQL: SELECT "record" FROM bislett_athletes_2 WHERE "nationality" = 'norway' AND "date" = '23 august 1981'

Question: What is the record for the 20000 m walk?
SQL: SELECT "record" FROM bislett_athletes_2 WHERE "event" = '20000 m walk'