code: def get_cpf_cnpj_by_pronac(pronac):
      
      df = data.planilha_projetos
      cpf_cnpj = None
      row_df = df[df['PRONAC'].astype(str) == str(pronac)]
  
      if not row_df.empty:
          cpf_cnpj = row_df.iloc[0]['CgcCpf']
  
      return str(cpf_cnpj)
docs: Return the CNPF/CNPJ of the proponent
      of the project with the given pronac.