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license: apache-2.0
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---
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license: apache-2.0
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language:
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- el
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metrics:
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- f1
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- recall
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- precision
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- hamming_loss
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pipeline_tag: text-classification
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widget:
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- text: >-
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Δεν ξέρω αν είμαι ο μόνος αλλά πιστεύω πως όσο είμαστε απασχολημένοι με την όλη κατάσταση της αστυνομίας η κυβέρνηση προσπαθεί να καλύψει αλλά γεγονότα της επικαιρότητας όπως πανδημία και εξωτερική πολιτική.
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example_title: Πολιτική
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- text: >-
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Άλλες οικονομίες, όπως η Κίνα, προσπαθούν να διατηρούν την αξία του νομίσματος τους χαμηλά ώστε να καταστήσουν τις εξαγωγές τους πιο ελκυστικές στο εξωτερικό. Γιατί όμως θεωρούμε πως η πτωτική πορεία της Τουρκικής λίρας είναι η "αχίλλειος πτέρνα" της Τουρκίας;
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example_title: Οικονομία
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- text: >-
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Γνωρίζει κανείς γιατί δεν ψηφίζουμε πια για να βγει ποιο τραγούδι θα εκπροσωπήσει την Ελλάδα; Τα τελευταία χρόνια ο κόσμος είναι δυσαρεστημένος με τα τραγούδια που στέλνουν, γιατί συνεχίζεται αυτό;
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example_title: Ψυχαγωγία/Κουλτούρα
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model-index:
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- name: IMISLab/Greek-Reddit-BERT
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results:
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- task:
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type: text-classification
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name: Text-classification
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dataset:
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name: GreekReddit
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type: greekreddit
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config: default
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split: test
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metrics:
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- name: Precision
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type: precision
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value: 80.05
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verified: true
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- name: Recall
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type: recall
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value: 81.48
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verified: true
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- name: F1
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type: f1
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value: 80.61
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verified: true
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- name: Hamming Loss
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type: hamming_loss
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value: 19.84
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verified: true
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datasets:
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- IMISLab/GreekReddit
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library_name: transformers
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tags:
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- Social Media
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- Reddit
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- Topic Classification
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- Text Classification
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- Greek NLP
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---
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# Greek-Reddit-BERT
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A Greek topic classification model based on [GREEK-BERT](https://huggingface.co/nlpaueb/bert-base-greek-uncased-v1)
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This model is fine-tuned on [GreekReddit](https://huggingface.co/datasets/IMISLab/GreekReddit) as part of our upcoming research paper:
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[Mastrokostas, C., Giarelis, N., & Karacapilidis, N. (2024) Social Media Topic Classification on Greek Reddit]()
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For more information see the evaluation section below.
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## Training dataset
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The training dataset of `Greek-Reddit-BERT` is [GreekReddit](https://huggingface.co/datasets/IMISLab/GreekReddit), which is a topic classification dataset.
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Overall, [GreekReddit](https://huggingface.co/datasets/IMISLab/GreekReddit) contains 6,534 user posts collected from Greek subreddits belonging to various topics (i.e., society, politics, economy, entertainment/culture, sports).
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## Training configuration
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We fine-tuned `nlpaueb/bert-base-greek-uncased-v1` (110 million parameters) on the GreekReddit train split using the following parameters:
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* GPU batch size = 16
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* Total training epochs = 4
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* Learning rate = 5e−5
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* Dropout Rate = 0.1
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* Number of labels = 10
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* No warmup steps
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* 32-bit floating precision
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* Tokenization
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* maximum input token length = 512
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* padding = True
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* truncation = True
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## Evaluation
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**Model**|**Precision**|**Recall**|**F1**|**Hamming Loss**
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------------|-----------|-----------|-----------|-------------
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Greek-Reddit-BERT|80.05|81.48|80.61|19.84
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### Example code
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```python
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from transformers import AutoModelForSequenceClassification, AutoTokenizer, pipeline
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model_name = 'IMISLab/Greek-Reddit-BERT'
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model = AutoModelForSequenceClassification.from_pretrained(model_name)
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tokenizer = AutoTokenizer.from_pretrained(model_name)
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topic_classifier = pipeline(
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'text-classification',
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device = 'cpu',
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model = model,
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tokenizer = tokenizer,
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truncation = True,
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max_length = 512
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)
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text = 'Άλλες οικονομίες, όπως η Κίνα, προσπαθούν να διατηρούν την αξία του νομίσματος τους χαμηλά ώστε να καταστήσουν τις εξαγωγές τους πιο ελκυστικές στο εξωτερικό. Γιατί όμως θεωρούμε πως η πτωτική πορεία της Τουρκικής λίρας είναι η ""αχίλλειος πτέρνα"" της Τουρκίας;'
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output = topic_classifier(text)
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print(output[0]['label'])
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```
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## Contact
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If you have any questions/feedback about the model please e-mail one of the following authors:
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```
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giarelis@ceid.upatras.gr
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cmastrokostas@ac.upatras.gr
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karacap@upatras.gr
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```
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## Citation
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```
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TBA
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```
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