Table: world_championship_marathon
Columns: world_record
paula_radcliffe_gbr
2_15_25
london_great_britain
13_april_2003

Question: Name the london, great britain for 2:20:57
SQL: SELECT "london_great_britain" FROM world_championship_marathon WHERE "2_15_25" = '2:20:57'

Question: Name the world record for 26 april 2009
SQL: SELECT "world_record" FROM world_championship_marathon WHERE "13_april_2003" = '26 April 2009'

Question: Name the london great britain for championship record
SQL: SELECT "london_great_britain" FROM world_championship_marathon WHERE "world_record" = 'Championship record'

Question: Name the total number of african record
SQL: SELECT COUNT("paula_radcliffe_gbr") FROM world_championship_marathon WHERE "world_record" = 'African record'