1{"text": "Cannot borrow as mutable more than once at a time.", "seconds": 2.6, "syllables": [["Can", 0.036], ["not ", 0.137], ["bor", 0.345], ["row ", 0.524], ["as ", 0.703], ["mu", 0.85], ["ta", 1.002], ["ble ", 1.153], ["more ", 1.325], ["than ", 1.55], ["once ", 1.725], ["at ", 1.953], ["a ", 2.119], ["time.", 2.239]]}