eq { diff { hop { filter_eq { all_rows ; name ; keith benson } ; weight } ; hop { filter_eq { all_rows ; name ; tim williams } ; weight } } ; 10 } = true
select the rows whose name record fuzzily matches to keith benson . take the weight record of this row . select the rows whose name record fuzzily matches to tim williams . take the weight record of this row . the first record is 10 larger than the second record .