---
language:
- en
license:
- other
multilinguality:
- monolingual
size_categories:
- n<1K
pretty_name: relbert/t_rex
---

# Dataset Card for "relbert/t_rex"
## Dataset Description
- **Repository:** [https://hadyelsahar.github.io/t-rex/](https://hadyelsahar.github.io/t-rex/)
- **Paper:** [https://aclanthology.org/L18-1544/](https://aclanthology.org/L18-1544/)
- **Dataset:** Cleaned T-REX for link prediction.

## Dataset Summary
This is the T-REX dataset proposed in [https://aclanthology.org/L18-1544/](https://aclanthology.org/L18-1544/).
The test split is universal across different version, which is manually checked by the author of [relbert/t_rex](https://huggingface.co/datasets/relbert/t_rex), 
and the test split contains predicates that is not included in the train/validation split.
The number of triples in each split is summarized in the table below.

***Note:*** To make it consistent with other datasets ([nell](https://huggingface.co/datasets/relbert/nell) and [conceptnet](https://huggingface.co/datasets/relbert/conceptnet)), we rename predicate/subject/object as relation/head/tail.

- Number of instances

|                                 |   train |   validation |   test |
|:--------------------------------|--------:|-------------:|-------:|
| number of triples               |   1,274,264 |           318,566 |    122 |
| number of unique relation types (predicate) |     759 |           676 |     34 |


### Filtering to Remove Noise
We apply filtering to keep triples with named-entities in either of head or tail (`named-entity filter`).
Then, we remove predicates if they have less than three triples (`rare-predicate filter`).
After the filtering, we manually remove too vague and noisy predicate, and unify same predicates with different names (see the annotation [here](https://huggingface.co/datasets/relbert/t_rex/raw/main/predicate_manual_check.csv)).
Finally, we remove triples that contain enties that has frequency less than 5 (`frequnecy`).

| Dataset   | `raw`      | `named-entity filter`  | `rare-predicate` | `unify-denoise-predicate` | `frequnecy` |
|:----------|-----------:|-----------------------:|-----------------:|--------------------------:|------------:|
| Triples   | 20,877,472 | 12,561,573             | 12,561,250       | 12,410,726                | 1,616,065      |
| Predicate | 1,616      | 1,470                  | 1,237            | 839                       | 839         |



## Dataset Structure
An example looks as follows.
```shell
{
  "tail": "Persian",
  "head": "Tajik",
  "title": "Tandoor bread",
  "text": "Tandoor bread (Arabic: \u062e\u0628\u0632 \u062a\u0646\u0648\u0631 khubz tannoor, Armenian: \u0569\u0578\u0576\u056b\u0580 \u0570\u0561\u0581 tonir hats, Azerbaijani: T\u0259ndir \u00e7\u00f6r\u0259yi, Georgian: \u10d7\u10dd\u10dc\u10d8\u10e1 \u10de\u10e3\u10e0\u10d8 tonis puri, Kazakh: \u0442\u0430\u043d\u0434\u044b\u0440 \u043d\u0430\u043d tandyr nan, Kyrgyz: \u0442\u0430\u043d\u0434\u044b\u0440 \u043d\u0430\u043d tandyr nan, Persian: \u0646\u0627\u0646 \u062a\u0646\u0648\u0631\u06cc nan-e-tanuri, Tajik: \u043d\u043e\u043d\u0438 \u0442\u0430\u043d\u0443\u0440\u0439 noni tanuri, Turkish: Tand\u0131r ekme\u011fi, Uyghur: ) is a type of leavened bread baked in a clay oven called a tandoor, similar to naan. In Pakistan, tandoor breads are popular especially in the Khyber Pakhtunkhwa and Punjab regions, where naan breads are baked in tandoor clay ovens fired by wood or charcoal. These tandoor-prepared naans are known as tandoori naan.",
  "relation": "[Artifact] is a type of [Type]"
}
```

## Reproduce the Dataset

```shell
git clone https://huggingface.co/datasets/relbert/t_rex
cd t_rex
mkdir data_raw
cd data_raw
cd data_raw
wget https://figshare.com/ndownloader/files/8760241
unzip 8760241
cd ../
python process.py
python unify_predicate.py
python min_entity_filter.py
python create_split.py
```

## Citation Information
```
@inproceedings{elsahar2018t,
  title={T-rex: A large scale alignment of natural language with knowledge base triples},
  author={Elsahar, Hady and Vougiouklis, Pavlos and Remaci, Arslen and Gravier, Christophe and Hare, Jonathon and Laforest, Frederique and Simperl, Elena},
  booktitle={Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)},
  year={2018}
} 
```