less { hop { filter_eq { all_rows ; model / engine ; 1.8 duratec he } ; capacity } ; hop { filter_eq { all_rows ; model / engine ; 2.0 duratec he } ; capacity } } = true
select the rows whose model  engine record fuzzily matches to 1.8 duratec he . take the capacity record of this row . select the rows whose model  engine record fuzzily matches to 2.0 duratec he . take the capacity record of this row . the first record is less than the second record .