| Composition | Ec (kJ/mol) | Ec (kJ/mol) | Ec (kJ/mol)   | Ec (kJ/mol) | n             | n        | n       |
| Composition | Kissinger   | Ozawa       | Augis-Bennett | Matusita    | Augis-Bennett | Matusita | Average |
| 20C         | 557+-76     | 581+-73     | 577+-73       | 648+-39     | 2.5+-0.2      | 2.7+-0.4 | 3+-0.3  |
| 40C         | 383+-79     | 389+-79     | 376+-79       | 563+-57     | 2.5+-0.2      | 2.6+-0.4 | 3+-0.3  |

Caption: Calculated Ec values (kJ/mol) and Avrami exponent n by different methods.

You are provided with a table from a material science paper. Here are JSON templates for two types of numeric cells: "Other" and "Glass_Compound_Amount":
{"value": "xx", "type": "Other"}
{"value": "xx", "type": "Glass_Compound_Amount", "constituent": "xx", "unit": "xx", "material": "xx"}

Please describe all numeric cells in the above table following the JSON templates (proceeding by row in a left-right, top-down direction). For each cell, output one JSON description per line. For any unanswerable attributes in the templates, set their value to the placeholder "xx".

Cell Description:
{"value": "557", "type": "Other"}
{"value": "581", "type": "Other"}
{"value": "577", "type": "Other"}
{"value": "648", "type": "Other"}
{"value": "2.5", "type": "Other"}
{"value": "2.7", "type": "Other"}
{"value": "3", "type": "Other"}
{"value": "383", "type": "Other"}
{"value": "389", "type": "Other"}
{"value": "376", "type": "Other"}
{"value": "563", "type": "Other"}
{"value": "2.5", "type": "Other"}
{"value": "2.6", "type": "Other"}
{"value": "3", "type": "Other"}