Kisa on Nostr: what does PV mean ?

{ "id": "54b6586760d243ccfb0ba5c16aa4d71133fc15bd50f98e30e792d5d1a4e07558", "pubkey": "ab2bb23ddda009492ffc89bda608b3d09173e97d46f2be6b3d40678822de4e30", "created_at": 1675543485, "kind": 1, "tags": [ [ "e", "8bd6c0b6d47be383d639055248ecffab526cd9ba135b51a74f628d6a752d331d", "", "root" ], [ "e", "c778467f285417c0fb35b7c6a35b289ef44c15fdcd019548b9cba47c72edb20d", "", "reply" ], [ "p", "1bc70a0148b3f316da33fe3c89f23e3e71ac4ff998027ec712b905cd24f6a411" ], [ "p", "ecfa3c5c82d589c867c044056f75d6cff794f1886d5ebcdd48ad851da47adae4" ] ], "content": "what does PV mean ?", "sig": "77048f2ff269d1dd58b02ee2fc8203ddc61d7b1f20751b9f520f0c36e69a1da589118b72becfdfb4dbc3350065d86ddeb1c329ef9e1e7b749562da9b6c9bcd90" }