and { only { filter_eq { all_rows ; round of 16 ; 15-8 } } ; eq { hop { filter_eq { all_rows ; round of 16 ; 15-8 } ; athlete } ; alexander achten } } = true
select the rows whose round of 16 record fuzzily matches to 158 . there is only one such row in the table . the athlete record of this unqiue row is alexander achten .