and { only { filter_greater { all_rows ; position ; 15th } } ; and { eq { hop { filter_greater { all_rows ; position ; 15th } ; year } ; 2008 } ; eq { hop { filter_greater { all_rows ; position ; 15th } ; competition } ; olympic games } } } = true
select the rows whose position record is greater than 15th . there is only one such row in the table . the year record of this unqiue row is 2008 . the competition record of this unqiue row is olympic games .