---
license: cc-by-4.0
language:
- ar
---
# Verified Claim Reterieval

This repo demonstrates how to perform retrieval over a collection of verified claims for a given query. The provided model is a tuned version of AraBERT on AraFACTs dataset. Tuning details can be found in this [repo](https://gitlab.com/watheq/detecting-previously-checked-claims-over-twitter).

First, you need to fill in the required paths for BERT model and Index.
After that, you just need two steps:

1. Create an object of *ClaimRetrieval* class and pass the suitable parameters.
2. Invoke *retrieve_relevant_vclaims* and pass the tweets as parameters.

## Example

Here is a full example to do that. First, prepare the input:

```
tweets = [{'id_str': '1433976054562045952',
    'full_text': 'مرتضى منصور : قررت ايقاف الولد امام عاشور وبيعه ولو هيجيبلي كأس العالم.. "مينفعش لاعيية تبقى بتصلي ولاعب صابغ شعره زي البنات.. ايه القرف ده .. وشاطر بس يطلب زيادة عقده و مش قادر يجري و يروح نايم لي على بطنه ويتسبب ان يخش فينا اجوان ، ما تسترجل يا ولد انت موقوف ومتحول للتحقيق " https://t.co/df2QvC0Zu9'},]  # input tweet
```

Then, initialize an object only once.

```
lang = "ar"
index_path = "path/to/pyterrier_index"
bert_name = "aubmindlab/bert-base-arabertv02"
trained_model_weights = "tuned_model_weights.bin"  # AraBERT weights


claim_retrieval = ClaimRetrieval(index_path=index_path, lang='ar', bert_name, trained_model_weights,  		                    random_seed=42, depth=20, batch_size= 8,num_classes=2, dropout=0.3, is_output_probability=True, num_layers=2, max_len=256)
```

Pass the input tweet to retrieve the relevat vclaims

```
queries_and_relevant_vclaims = claim_retrieval.retrieve_relevant_vclaims(tweets)
```

## Citation

If you used any piece of this repository, please consider citing our work :

```plaintext
@inproceedings{mansour2022did,
  title={Did I See It Before? Detecting Previously-Checked Claims over Twitter},
  author={Mansour, Watheq and Elsayed, Tamer and Al-Ali, Abdulaziz},
  booktitle={European Conference on Information Retrieval},
  pages={367--381},
  year={2022},
  organization={Springer}
}
```

license: cc-by-4.0