and { only { filter_eq { filter_eq { all_rows ; event ; championship test } ; horse ; donna dm } } ; eq { hop { filter_eq { filter_eq { all_rows ; event ; championship test } ; horse ; donna dm } ; athlete } ; sabine peters } } = true
select the rows whose event record fuzzily matches to championship test . among these rows , select the rows whose horse record fuzzily matches to donna dm . there is only one such row in the table . the athlete record of this unqiue row is sabine peters .