and { greater { hop { filter_eq { all_rows ; model ; herbert } ; poweramp } ; hop { filter_eq { all_rows ; model ; vh4s } ; poweramp } } ; and { eq { hop { filter_eq { all_rows ; model ; herbert } ; poweramp } ; mono , 6 tubes } ; eq { hop { filter_eq { all_rows ; model ; vh4s } ; poweramp } ; stereo , 4 tubes } } } = true
select the rows whose model record fuzzily matches to herbert . take the poweramp record of this row . select the rows whose model record fuzzily matches to vh4s . take the poweramp record of this row . the first record is greater than the second record . the poweramp record of the first row is mono , 6 tubes . the poweramp record of the second row is stereo , 4 tubes .