and { eq { hop { filter_eq { all_rows ; chassis ; mclaren } ; year } ; hop { filter_eq { all_rows ; chassis ; mclaren } ; year } } ; and { eq { hop { filter_eq { all_rows ; chassis ; mclaren } ; year } ; 1981 } ; eq { hop { filter_eq { all_rows ; chassis ; mclaren } ; year } ; 1981 } } } = true
select the rows whose chassis record fuzzily matches to mclaren . take the year record of this row . select the rows whose chassis record fuzzily matches to mclaren . take the year record of this row . the first record is equal to the second record . the year record of the first row is 1981 . the year record of the second row is 1981 .