Question: Where was the London Marathon held?
SQL: SELECT "Venue" FROM "2-18876359-2" WHERE "Event" = 'Marathon' AND "Competition" = 'London Marathon';

Question: In what years did Salina Kosgei compete in singapore?
SQL: SELECT COUNT("Year") FROM "2-18876359-2" WHERE "Venue" = 'singapore';

Question: In what position did Salina Kosgei finish in the Tokyo Marathon?
SQL: SELECT "Position" FROM "2-18876359-2" WHERE "Competition" = 'Tokyo Marathon';