dubdam on Nostr: Who is #[0] ?

{ "id": "c5db658445d100a95ff46d9e8400801fbfa5b17ed8660fd273afa79a2918f0d5", "pubkey": "6d2d244c5766c849cf6b9e21f2f697018f329a28df487e6446d3fb5c4258039c", "created_at": 1678497384, "kind": 1, "tags": [ [ "p", "63fe6318dc58583cfe16810f86dd09e18bfd76aabc24a0081ce2856f330504ed" ] ], "content": "Who is #[0] ?", "sig": "954635ea61ce8ff39f9283bcb163e9db3f28159b2531031905d54c18112b169ee181b135c70ce0d4c41c8a08afaa3b74548f9e237f3e3a5a22cd778d4238ac1c" }