Need help with value_template

Configuration
1

Hi.
The noob need help =)
i am using a command line switch.
i want the switch to get the right state.

switch:
  platform: command_line
  switches:
    Zon2:
      oncmd: onkyo zone2.power=on
      offcmd: onkyo zone2.power=standby
      statecmd: onkyo zone2.power=query
      value_template: ---i dont know what i need here.---

statecmd: onkyo zone2.power=query

This command till give me:

<eISCP(TX-NR626) 192.168.1.10:60128>: ZPWQSTN ('power', 'on')
or
<eISCP(TX-NR626) 192.168.1.10:60128>: ZPWQSTN ('power', 'standby')
how can i get the switch to get the actual state?