less { hop { filter_eq { all_rows ; line ; sofia - dragoman } ; length } ; hop { filter_eq { all_rows ; line ; vidin - sofia } ; length } } = true
select the rows whose line record fuzzily matches to sofia  dragoman . take the length record of this row . select the rows whose line record fuzzily matches to vidin  sofia . take the length record of this row . the first record is less than the second record .