less { hop { filter_eq { all_rows ; year ; 1969 } ; start } ; hop { filter_eq { all_rows ; year ; 1970 } ; start } } = true
select the rows whose year record fuzzily matches to 1969 . take the start record of this row . select the rows whose year record fuzzily matches to 1970 . take the start record of this row . the first record is less than the second record .