Task: Code to Text
Input (English): and { only { filter_eq { all_rows ; class / type ; passenger ship } } ; eq { hop { filter_eq { all_rows ; class / type ; passenger ship } ; builder } ; john roach and son } } = true
Output (English): select the rows whose class  type record fuzzily matches to passenger ship . there is only one such row in the table . the builder record of this unqiue row is john roach and son .