| Composition  | Al [6] (ppm) [% Al [6]] | Al [5] (ppm) [% Al [5]] | Al [4] (ppm) [% Al [4]] |
| 50-7.5-42.5  | -12.6 [85.2+-0.8%]      | +15.4 [6.3+-0.3%]       | +46.5 [7.9+-0.9%]       |
| 50-10-40     | -13.3 [52.6+-0.1%]      | +14.2 [22.5+-0.1%]      | +47.4 [25.0+-0.1%]      |
| 50-12.5-37.5 | -13.9 [31.1+-0.3%]      | +14.2 [14.5+-0.1%]      | +47.2 [54.4+-0.8%]      |

Caption: Observed aluminum shifts and relative percentages in glass samples

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": "50", "type": "Other"}
{"value": "7.5", "type": "Other"}
{"value": "42.5", "type": "Other"}
{"value": "+15.4", "type": "Other"}
{"value": "+46.5", "type": "Other"}
{"value": "50", "type": "Other"}
{"value": "10", "type": "Other"}
{"value": "40", "type": "Other"}
{"value": "+14.2", "type": "Other"}
{"value": "+47.4", "type": "Other"}
{"value": "50", "type": "Other"}
{"value": "12.5", "type": "Other"}
{"value": "37.5", "type": "Other"}
{"value": "+14.2", "type": "Other"}
{"value": "+47.2", "type": "Other"}