and { only { filter_eq { all_rows ; venue ; princes park } } ; and { eq { hop { filter_eq { all_rows ; venue ; princes park } ; home team } ; carlton } ; eq { hop { filter_eq { all_rows ; venue ; princes park } ; away team } ; geelong } } } = true
select the rows whose venue record fuzzily matches to princes park . there is only one such row in the table . the home team record of this unqiue row is carlton . the away team record of this unqiue row is geelong .