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Click the button for Japanese level and the language of description you want to use in the box on the right.
The phrase 知っています expresses a state of possessing knowledge/information after "getting to know (=知る)" something. Note that the negative is not 知っていません, but 知りません.
A: あなたは ジョンさんの じゅうしょを 知って いますか。 Do you know/have John's address?