August 20, Cmdr. NAME_1 relieved Cmdr. NAME_2. NAME_3 as CO of the "Shadowhawks" of Electronic Attack Squadron (VAQ) 141 during an aerial change-of-command ceremony, while underway in the Philippine Sea.

Perform the following actions:
Step1: Identify all events according to date from  the news.
Step2: Extract the following items for each event:
    - date
    - Subject 
    - Object 
    - Location
    - activity

The date must be extracted from the text.
Output each event in JSON format with the keys: "date", "subject", "object", "location", "activity".
If the information isn't present, use "unknown" as the value. Write exactly 3 paragraphs each separated with two new lines answering this question. The first paragraph must start with "service".
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