code: def from_dict(d):
          
          query_params_match = d.get('@query_params_match')
          sources = [Source.from_dict(source) for source in d.get('sources', [])]
          fields = Person.fields_from_dict(d)
          return Person(fields=fields, sources=sources,
                        query_params_match=query_params_match)
docs: Transform the dict to a person object and return the person.