eq { diff { hop { filter_eq { all_rows ; incumbent ; doug walgren } ; first elected } ; hop { filter_eq { all_rows ; incumbent ; tom ridge } ; first elected } } ; -6 } = true
select the rows whose incumbent record fuzzily matches to doug walgren . take the first elected record of this row . select the rows whose incumbent record fuzzily matches to tom ridge . take the first elected record of this row . the second record is 6 larger than the first record .