eq { diff { hop { filter_eq { all_rows ; venue ; stuttgart , west germany } ; year } ; hop { filter_eq { all_rows ; venue ; seoul , south korea } ; year } } ; -2 years } = true
select the rows whose venue record fuzzily matches to stuttgart , west germany . take the year record of this row . select the rows whose venue record fuzzily matches to seoul , south korea . take the year record of this row . the second record is 2 years larger than the first record .