and { only { filter_eq { all_rows ; date ; 2013 } } ; eq { hop { filter_eq { all_rows ; date ; 2013 } ; tournament } ; oklahoma city , usa f9 } } = true
select the rows whose date record fuzzily matches to 2013 . there is only one such row in the table . the tournament record of this unqiue row is oklahoma city , usa f9 .