and { only { filter_eq { all_rows ; date of vacancy ; 21 december 2010 } } ; eq { hop { filter_eq { all_rows ; date of vacancy ; 21 december 2010 } ; outgoing head coach } ; jorge costa } } = true
select the rows whose date of vacancy record fuzzily matches to 21 december 2010 . there is only one such row in the table . the outgoing head coach record of this unqiue row is jorge costa .