code: def version(self):
          
          try:
              _version = (curl[Gentoo._LATEST_TXT] | \
                      awk['NR==2{print}'] | \
                      cut["-f2", "-d="])().strip()
              _version = datetime.utcfromtimestamp(int(_version))\
                  .strftime("%Y-%m-%d")
          except ProcessExecutionError as proc_ex:
              _version = "unknown"
              LOG.error("Could not determine timestamp: %s",
                        str(proc_ex))
          return _version
docs: Return the build date of the gentoo container.