Task: Data-Imputation (source dataset: tablib)

Please fill in the missing value in the input table. The missing value is denoted by '[MISSING]'. Please only return the value filled in. Do not return the whole table.

No explanation, return the value filled in JSON format: {"value": "filled_value"}. 

Input Table:
| Pin    | AF1      | AF2       | AF3      | AF4       | AF5   | AF6   | AF7   | AF8         | AF9           |
|:-------|:---------|:----------|:---------|:----------|:------|:------|:------|:------------|:--------------|
| GPIO0  | SPI0_RX  | UART0_TX  | I2C0_SDA | PWM0_A    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO1  | SPI0_CS  | UART0_RX  | I2C0_SCL | PWM0_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO2  | SPI0_SCK | UART0_CTS | I2C1_SDA | PWM1_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO3  | SPI0_TX  | UART0_RTS | I2C1_SCL | PWM1_B    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO4  | SPI0_RX  | UART1_TX  | I2C0_SDA | PWM2_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO5  | SPI0_CS  | UART1_RX  | I2C0_SCL | PWM2_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO6  | SPI0_SCK | UART1_CTS | I2C1_SDA | [MISSING] | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO7  | SPI0_TX  | UART1_RTS | I2C1_SCL | PWM3_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO8  | SPI1_RX  | UART1_TX  | I2C0_SDA | PWM4_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO9  | SPI1_CS  | UART1_RX  | I2C0_SCL | PWM4_B    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO10 | SPI1_SCK | UART1_CTS | I2C1_SDA | PWM5_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO11 | SPI1_TX  | UART1_RTS | I2C1_SCL | PWM5_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO12 | SPI1_RX  | UART0_TX  | I2C0_SDA | PWM6_A    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO13 | SPI1_CS  | UART0_RX  | I2C0_SCL | PWM6_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO14 | SPI1_SCK | UART0_CTS | I2C1_SDA | PWM7_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO15 | SPI1_TX  | UART0_RTS | I2C1_SCL | PWM7_B    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO16 | SPI0_RX  | UART0_TX  | I2C0_SDA | PWM0_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO17 | SPI0_CS  | UART0_RX  | I2C0_SCL | PWM0_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO18 | SPI0_SCK | UART0_CTS | I2C1_SDA | PWM1_A    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO19 | SPI0_TX  | UART0_RTS | I2C1_SCL | PWM1_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO20 | SPI0_RX  | UART1_TX  | I2C0_SDA | PWM2_A    | SIO   | PIO0  | PIO1  | GPCK_GPIN0  | USB_VBUS_EN   |
| GPIO21 | SPI0_CS  | UART1_RX  | I2C0_SCL | PWM2_B    | SIO   | PIO0  | PIO1  | GPCK_GPOUT0 | USB_OVCUR_DET |
| GPIO22 | SPI0_SCK | UART1_CTS | I2C1_SDA | PWM3_A    | SIO   | PIO0  | PIO1  | GPCK_GPIN1  | USB_VBUS_DET  |
| GPIO23 | SPI0_TX  | UART1_RTS | I2C1_SCL | PWM3_B    | SIO   | PIO0  | PIO1  | GPCK_GPOUT1 | USB_VBUS_EN   |
| GPIO24 | SPI1_RX  | UART1_TX  | I2C0_SDA | PWM4_A    | SIO   | PIO0  | PIO1  | GPCK_GPOUT2 | USB_OVCUR_DET |
| GPIO25 | SPI1_CS  | UART1_RX  | I2C0_SCL | PWM4_B    | SIO   | PIO0  | PIO1  | GPCK_GPOUT3 | USB_VBUS_DET  |
| GPIO26 | SPI1_SCK | UART1_CTS | I2C1_SDA | PWM5_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |
| GPIO27 | SPI1_TX  | UART1_RTS | I2C1_SCL | PWM5_B    | SIO   | PIO0  | PIO1  | None        | USB_OVCUR_DET |
| GPIO28 | SPI1_RX  | UART0_TX  | I2C0_SDA | PWM6_A    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_DET  |
| GPIO29 | SPI1_CS  | UART0_RX  | I2C0_SCL | PWM6_B    | SIO   | PIO0  | PIO1  | None        | USB_VBUS_EN   |



row_idx: 6
col_idx: 4
col_name: AF4
label: PWM3_A
output: value: PWM3_A
tablib_key: tables/job=github_000005/batch=009026/7zub_XMTnXCT3G8FZzc-SFxJrvysCDdr3_G2sj5_yOY=