and { only { filter_eq { all_rows ; team ( s ) ; dingman brothers racing } } ; eq { hop { filter_eq { all_rows ; team ( s ) ; dingman brothers racing } ; year } ; 1987 } } = true
select the rows whose team  s  record fuzzily matches to dingman brothers racing . there is only one such row in the table . the year record of this unqiue row is 1987 .