and { only { filter_eq { all_rows ; school / club team ; st john 's } } ; eq { hop { filter_eq { all_rows ; school / club team ; st john 's } ; player } ; mark jackson } } = true
select the rows whose school  club team record fuzzily matches to st john s . there is only one such row in the table . the player record of this unqiue row is mark jackson .