and { only { filter_eq { all_rows ; venue ; london , england } } ; eq { hop { filter_eq { all_rows ; venue ; london , england } ; date } ; 6 february 2008 } } = true
select the rows whose venue record fuzzily matches to london , england . there is only one such row in the table . the date record of this unqiue row is 6 february 2008 .