| Porous glass            | SiO2 | Al2O3 | B2O3  | Fe2O3 | MgO  | CaO  | Na2O | K2O  | Others |
| Before alkali treatment | 69.6 | 9.16  | 11.36 | 0.82  | 0.2  | 2.84 | 4.57 | 1.08 | 0.37   |
| After alkali treatment  | 63.5 | 11.6  | 12.28 | 1.06  | 0.24 | 3.66 | 6.17 | 1.38 | 0.11   |

Caption: Chemical compositions (wt%) of porous glass (750degC, 20h) before and after alkali treatment.

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": "69.6", "type": "Glass_Compound_Amount", "constituent": "SiO2", "unit": "wt", "material": "Before alkali treatment"}
{"value": "9.16", "type": "Glass_Compound_Amount", "constituent": "Al2O3", "unit": "wt", "material": "Before alkali treatment"}
{"value": "11.36", "type": "Glass_Compound_Amount", "constituent": "B2O3", "unit": "wt", "material": "Before alkali treatment"}
{"value": "0.82", "type": "Glass_Compound_Amount", "constituent": "Fe2O3", "unit": "wt", "material": "Before alkali treatment"}
{"value": "0.2", "type": "Glass_Compound_Amount", "constituent": "MgO", "unit": "wt", "material": "Before alkali treatment"}
{"value": "2.84", "type": "Glass_Compound_Amount", "constituent": "CaO", "unit": "wt", "material": "Before alkali treatment"}
{"value": "4.57", "type": "Glass_Compound_Amount", "constituent": "Na2O", "unit": "wt", "material": "Before alkali treatment"}
{"value": "1.08", "type": "Glass_Compound_Amount", "constituent": "K2O", "unit": "wt", "material": "Before alkali treatment"}
{"value": "0.37", "type": "Glass_Compound_Amount", "constituent": "Others", "unit": "wt", "material": "Before alkali treatment"}
{"value": "63.5", "type": "Glass_Compound_Amount", "constituent": "SiO2", "unit": "wt", "material": "After alkali treatment"}
{"value": "11.6", "type": "Glass_Compound_Amount", "constituent": "Al2O3", "unit": "wt", "material": "After alkali treatment"}
{"value": "12.28", "type": "Glass_Compound_Amount", "constituent": "B2O3", "unit": "wt", "material": "After alkali treatment"}
{"value": "1.06", "type": "Glass_Compound_Amount", "constituent": "Fe2O3", "unit": "wt", "material": "After alkali treatment"}
{"value": "0.24", "type": "Glass_Compound_Amount", "constituent": "MgO", "unit": "wt", "material": "After alkali treatment"}
{"value": "3.66", "type": "Glass_Compound_Amount", "constituent": "CaO", "unit": "wt", "material": "After alkali treatment"}
{"value": "6.17", "type": "Glass_Compound_Amount", "constituent": "Na2O", "unit": "wt", "material": "After alkali treatment"}
{"value": "1.38", "type": "Glass_Compound_Amount", "constituent": "K2O", "unit": "wt", "material": "After alkali treatment"}
{"value": "0.11", "type": "Glass_Compound_Amount", "constituent": "Others", "unit": "wt", "material": "After alkali treatment"}