---
configs:
- config_name: cities
  data_files:
  - split: train
    path: cities/train-*
  - split: validation
    path: cities/validation-*
  - split: test
    path: cities/test-*
---

# CIS 5300 Language Models Dataset

Dataset for Homework 3 of CIS 5300 (Natural Language Processing) at Penn.

## Cities config

Country-of-origin classification over short city-name strings, drawn from
nine countries (Afghanistan, China, Germany, Finland, France, India, Iran,
Pakistan, South Africa).

```python
from datasets import load_dataset
cities = load_dataset("CCB/cis5300-language-models", "cities")
```

| Split        | Rows   | Has labels? |
|--------------|--------|-------------|
| `train`      | 12,392 | yes         |
| `validation` |  1,548 | yes         |
| `test`       |  1,531 | **no** (students predict) |

Each row has `city`, `country` (ISO code), and `country_name`. For the
`test` split, `country` and `country_name` are empty strings -- ground
truth is held back so students must submit predictions for grading.

## Raw corpus files

For character-level language modeling and cross-domain perplexity work:

| File | Size | Description |
|------|------|-------------|
| `shakespeare_input.txt`     | 4.5 MB | Complete Shakespeare works |
| `shakespeare_sonnets.txt`   |   9 KB | Held-out Shakespeare sonnets |
| `modern_english_sample.txt` | 4.4 KB | Modern-English prose for cross-domain perplexity |

Fetch with `huggingface_hub.hf_hub_download(..., repo_type="dataset")`.

## Licensing and attribution

- `shakespeare_input.txt` and `shakespeare_sonnets.txt` are in the public domain.
- `modern_english_sample.txt` is an excerpt from the English Wikipedia article
  "Natural language processing" (https://en.wikipedia.org/wiki/Natural_language_processing),
  used under the Creative Commons Attribution-ShareAlike 4.0 license
  (https://creativecommons.org/licenses/by-sa/4.0/). The excerpt covers the
  article's introduction and history sections, with Wikipedia section headers
  removed so the text reads as continuous prose. See ATTRIBUTIONS.md for details.
- The `cities` config is released under CC BY 4.0.