Audit a dataset for quality issues

Please audit this dataset for data quality issues.

{{paste_a_sample_of_your_data_first_20_30_}}

Context: This data is used for {{describe_what_you_do_with_it}}.

Please identify:
1. Missing or null values (which columns, how many rows affected)
2. Formatting inconsistencies (e.g. mixed date formats, case inconsistencies)
3. Duplicate records or near-duplicates
4. Outliers or values that seem wrong
5. Fields that are ambiguous or undefined

For each issue: give the specific problem and the recommended fix.

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