and { only { filter_eq { all_rows ; gp - gs ; 14 } } ; eq { hop { filter_eq { all_rows ; gp - gs ; 14 } ; season } ; 2009 } } = true
select the rows whose gp  gs record is equal to 14 . there is only one such row in the table . the season record of this unqiue row is 2009 .