less { hop { filter_eq { all_rows ; call sign ; k276dm } ; frequency mhz } ; hop { filter_eq { all_rows ; call sign ; k296ds } ; frequency mhz } } = true
select the rows whose call sign record fuzzily matches to k276dm . take the frequency mhz record of this row . select the rows whose call sign record fuzzily matches to k296ds . take the frequency mhz record of this row . the first record is less than the second record .