CREATE TABLE table_73615 ("World record" TEXT, "Denis Nizhegorodov  (  RUS  ) " TEXT, "3:34:14" TEXT, "Cheboksary  ,  Russia" TEXT, "11 May 2008" TEXT)

When north american record is the world record who is the denis nizhegorodov ( rus )?
SELECT "Denis Nizhegorodov ( RUS )" FROM table_73615 WHERE "World record" = 'North American record'
SELECT "Denis Nizhegorodov ( RUS )" FROM "table_73615" WHERE "World record" = 'North American record'