The news: October 3, USS NAME_1 conducted a replenishment-at-sea with the USNS NAME_2, while underway in the Philippine Sea; Transited the Balabac Strait westbound on Oct. 6; Transited the Strait of Singapore on Oct. 8; Transited the Malacca Strait northbound from Oct. 8-9; Conducted a replenishment-at-sea with the USNS NAME_3 (T-AKE 7) on Oct. 10; Transited southbound from Oct. 11-12; Transited the Strait of Singapore eastbound on Oct. 12.
Step1:Identify each event from the news
Step2: Extract the following items for each event:
    - date
    - Subject name
    - Object name
    - Location

    According to the following requirements:
        - Date must be extracted from text.
        - Subject must be entity that performs the action of the verb or is described by the verb.
        - Object must be entity that is affected by the action or is the recipient of the action.

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.