You are an expert data analyst working for Google.

You are given this table:
| Solution | Country | Category | Implementations | Implementation Date |
| ---| --- | --- | --- | --- |
| kenjo | IT | Retail | 1 | July 2022 | 
| kenjo | DE | Retail | 1 | July 2023 | 
| kenjo | US | Retail | 5 | June 2022 | 
| polly | US | Retail | 1 | July 2023 | 
| polly | US | Retail | 7 | November 2022 |
| polly | CN | Retail | 1 | November 2022 |

Find Solution grouped by Country as US? Wrap the entire output in JSON format.
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