The subject is entity that performs the action of the verb or is described by the verb.
The object is entity that is affected by the action of the verb or is the recipient of the action.
The lacation is often used to describe where an action is taking place.

August 20, Cmdr. NAME_1 relieved Cmdr. NAME_2 as CO of the "Shadowhawks" of Electronic Attack Squadron (VAQ) 141 during an aerial change-of-command ceremony, while underway in the Philippine Sea.
  
Extract the following items only from the above news:
  - date
  - Subject 
  - Object 
  - Location
  - activity

Format your response as a JSON object with "date" , "subject" , "object" , "location" and "activity" as the keys. The date must be extracte from the news.
If the information isn't present, use "unknown" as the value. I want the entire output in JSON format.
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