and { only { filter_greater { all_rows ; position ; 15 } } ; and { eq { hop { filter_greater { all_rows ; position ; 15 } ; year } ; 2005 } ; eq { hop { filter_greater { all_rows ; position ; 15 } ; competition } ; world youth championships } } } = true
select the rows whose position record is greater than 15 . there is only one such row in the table . the year record of this unqiue row is 2005 . the competition record of this unqiue row is world youth championships .