less { hop { filter_eq { all_rows ; candidate ; alfred dobbs } ; year } ; hop { filter_eq { all_rows ; candidate ; thomas mitchell } ; year } } = true
select the rows whose candidate record fuzzily matches to alfred dobbs . take the year record of this row . select the rows whose candidate record fuzzily matches to thomas mitchell . take the year record of this row . the first record is less than the second record .