Task: Data-Imputation (source dataset: WebTable)

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:
| Chip                    | Release    |   fab (nm) | Core clock (MHz)             | Pipeline                           |   Vertex shaders | Memory clock (MHz)                                 | Memory interface width (bit)   | Notes                                                                                                                                                                                               |
|:------------------------|:-----------|-----------:|:-----------------------------|:-----------------------------------|-----------------:|:---------------------------------------------------|:-------------------------------|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Savage XP (AlphaChrome) | 6/2002     |        150 | nan                          | nan                                |              nan | nan                                                | nan                            | DDR SDRAM. Unreleased.                                                                                                                                                                              |
| DeltaChrome S4 Pro      | mid-2004   |        130 | 300                          | 4/4/4                              |                2 | 300                                                | 128                            | Shader Model 2                                                                                                                                                                                      |
| DeltaChrome S8          | mid-2004   |        130 | 300                          | 8/8/8                              |                4 | 300                                                | 128                            | Shader Model 2                                                                                                                                                                                      |
| DeltaChrome S8 Nitro    | mid-2004   |        130 | 315                          | 8/8/8                              |                4 | [MISSING]                                          | 128                            | Shader Model 2                                                                                                                                                                                      |
| DeltaChrome S8 ULP      | mid-2004   |        130 | 200                          | 8/8/8                              |                4 | 300                                                | 128                            | Shader Model 2                                                                                                                                                                                      |
| GammaChrome S18 CE      | 3/2005     |        130 | 400                          | 4/4/4                              |                4 | 300                                                | 128                            | Shader Model 2                                                                                                                                                                                      |
| GammaChrome S18 PRO     | 3/2005     |        130 | 300                          | 4/4/4                              |                4 | 300                                                | 128                            | Shader Model 2                                                                                                                                                                                      |
| Chrome S25              | 11/2005    |         90 | 600                          | 4/8/8                              |                4 | 400 (Max 500/500/700 for GDDR1/GDDR2/GDDR3 memory) | 32/64/128                      | PCIe. GDDR1, GDDR2, GDDR3. AcceleRAM, MultiChrome.                                                                                                                                                  |
| Chrome S27              | 11/2005    |         90 | 700                          | 4/8/8                              |                4 | 700 (Max 500/500/700 for GDDR1/GDDR2/GDDR3 memory) | 32/64/128                      | PCIe. GDDR1, GDDR2, GDDR3. AcceleRAM, MultiChrome.                                                                                                                                                  |
| Chrome 430 GT           | 2/2008     |         65 | 625 Shader clock at 900 MHz  | Unified shader model (VS=PS=GS=32) |               32 | 1000 (500 GDDR2)                                   | 64                             | DirectX 10.1, OpenGL 2.1, PCIe 2.0, Shader Model 4.1, AcceleRAM, MultiChrome, H.264, MPEG2, MPEG4, VC1, WMVHD, AVS                                                                                  |
| Chrome 440 GTX          | 5/30/2008  |         65 | 800 Shader clock at 1100 MHz | Unified shader model (VS=PS=GS=32) |               32 | 1600 (800 GDDR3)                                   | 64                             | DirectX 10.1, OpenGL 2.1, PCIe 2.0, Shader Model 4.1, AcceleRAM, MultiChrome, H.264, MPEG2, MPEG4, VC1, WMVHD, AVS, features dual stream HD video playback and pip(picture in picture)              |
| Chrome 530 GT           | 11/20/2008 |         65 | 625 core clock MHz           | Unified shader model (VS=PS=GS=32) |               32 | 1000 (500 GDDR2)                                   | 64                             | DirectX 10.1, OpenGL 3.0, PCIe 2.0, Shader Model 4.1, AcceleRAM, MultiChrome, H.264, MPEG2, MPEG4, VC1, WMVHD, AVS, features dual stream HD video playback and pip(picture in picture)              |
| Chrome 540 GTX          | 02/07/2009 |         65 | 800 core clock MHz           | Unified shader model (VS=PS=GS=32) |               32 | 1700 (850 GDDR3)                                   | 64                             | DirectX 10.1, OpenGL 3.0, PCIe 2.0, Shader Model 4.1, AcceleRAM, MultiChrome, H.264, MPEG2, MPEG4, VC1, WMVHD, AVS, features dual stream HD video playback and pip(picture in picture), Displayport |



row_idx: 3
col_idx: 6
col_name: Memory clock (MHz)
label: 315