and { only { filter_eq { all_rows ; women 's singles ; sara persson } } ; eq { hop { filter_eq { all_rows ; women 's singles ; sara persson } ; year } ; 2006 } } = true
select the rows whose women s singles record fuzzily matches to sara persson . there is only one such row in the table . the year record of this unqiue row is 2006 .