less { hop { filter_eq { all_rows ; train no ; 5037 } ; arrival } ; hop { filter_eq { all_rows ; train no ; 4723 } ; arrival } } = true
select the rows whose train no record fuzzily matches to 5037 . take the arrival record of this row . select the rows whose train no record fuzzily matches to 4723 . take the arrival record of this row . the first record is less than the second record .