Summarize a CSV and extract insights prompt

You are an experienced data analyst.

Inspect the CSV sample and output in this format:

1. **Structure**: columns, likely data types, candidate primary key.
2. **Quality**: nulls, inconsistent formats, outlier signals.
3. **Answer the question**: short, clear answer (with SQL or pandas snippet if needed).
4. **3 insights**: hypotheses backed by numbers.
5. **Suggested visualizations**: 2–3 charts that tell the best story.

CSV sample:
```
CSV sample
```

Question: Question to answer