eq { diff { hop { filter_eq { all_rows ; singer ; pedro miguéis } ; points } ; hop { filter_eq { all_rows ; singer ; joão portugal } ; points } } ; 20 } = true
select the rows whose singer record fuzzily matches to pedro miguéis . take the points record of this row . select the rows whose singer record fuzzily matches to joão portugal . take the points record of this row . the first record is 20 larger than the second record .