Based on the analysis of the uploaded dataset, two issues have been identified related to missing data entries:

### Issue 1:
- **Issue**: "Missing medal_code entry"
- **Evidence**: The `medal_code` column has 1 missing value. In the dataset, all medal recipients are expected to have a designated medal code that corresponds to the type of medal (e.g., Gold: 1, Silver: 2, Bronze: 3).
- **Description**: There is at least one entry in the dataset where the `medal_code` is not provided. This could potentially lead to inaccuracies when trying to categorize or filter medal winners based on the type of medal received. A complete and accurate record of medal codes is essential for data integrity and analysis.

### Issue 2:
- **Issue**: "Missing url_event entries"
- **Evidence**: The `url_event` column has 9 missing values. This column is expected to contain URLs pointing to detailed event pages for each medal-winning performance.
- **Description**: The absence of URLs in 9 entries under the `url_event` column prevents users from accessing detailed information about the events in which the medals were won. This lack of data could impair the user's ability to conduct in-depth research or verification of the medal-winning performances. It detracts from the dataset's utility and completeness, potentially requiring manual correction or supplementation.