less { hop { filter_eq { all_rows ; competition ; world junior championships } ; position } ; hop { filter_eq { all_rows ; competition ; world championships } ; position } } = true
select the rows whose competition record fuzzily matches to world junior championships . take the position record of this row . select the rows whose competition record fuzzily matches to world championships . take the position record of this row . the first record is less than the second record .