eq { diff { hop { filter_eq { all_rows ; mens singles ; alan budi kusuma } ; year } ; hop { filter_eq { all_rows ; mens singles ; hermawan susanto } ; year } } ; -1 year } = true
select the rows whose mens singles record fuzzily matches to alan budi kusuma . take the year record of this row . select the rows whose mens singles record fuzzily matches to hermawan susanto . take the year record of this row . the second record is 1 year larger than the first record .