instruction: Start tracking walking activity.

previous_actions: 

active_application: 

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}
windows {
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  id: 1733
  window_type: TYPE_APPLICATION
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  is_focused: true
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      class_name: "android.widget.FrameLayout"
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      tooltip_text: "Navigate up"
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}


assistant: !FUNCTIONCALL{"name": "navigate_back", "parameters": {}}