and { only { filter_eq { all_rows ; 2002 - 03 ; 5849 } } ; eq { hop { filter_eq { all_rows ; 2002 - 03 ; 5849 } ; commodity } ; cattle and calves } } = true
select the rows whose 2002  03 record is equal to 5849 . there is only one such row in the table . the commodity record of this unqiue row is cattle and calves .