Gujarati-in-Devanagari-XLM-R-Base

Gujarati-in-Devanagari-XLM-R-Base

This model is finetuned over XLM-RoBERTa (XLM-R) using its base variant with the Gujarati language using the OSCAR monolingual dataset. We converted the Gujarati script to the Devanagari using Indic-NLP library. For example, the sentence 'અમદાવાદ એ ગુજરાતનું એક શહેર છે.' was converted to 'अमदावाद ए गुजरातनुं एक शहेर छे.'. This helped to get better contextualised representations for some words as the XLM-R was pre-trained with several languages written in Devanagari script such as Hindi, Marathi, Sanskrit, and so on.

We used the same masked language modelling (MLM) objective which was used for pretraining the XLM-R. As it is built over the pretrained XLM-R, we leveraged Transfer Learning by exploiting the knowledge from its parent model.

Dataset

OSCAR corpus contains several diverse datasets for different languages. We followed the work of CamemBERT who reported better performance with this diverse dataset as compared to the other large homogenous datasets.

Preprocessing and Training Procedure

Please visit this link for the detailed procedure.

Usage

• This model can be used for further finetuning for different NLP tasks using the Gujarati language.
• It can be used to generate contextualised word representations for the Gujarati words.
• It can be used for domain adaptation.
• It can be used to predict the missing words from the Gujarati sentences.

Demo

Using the model to predict missing words

from transformers import pipeline
unmasker = pipeline('fill-mask', model='ashwani-tanwar/Gujarati-in-Devanagari-XLM-R-Base')
pred_word = unmasker("अमदावाद ए गुजरातनुं एक <mask> छे.")
print(pred_word) 

[{'sequence': '<s> अमदावाद ए गुजरातनुं एक नगर छे.</s>', 'score': 0.24843722581863403, 'token': 18576, 'token_str': '▁नगर'}, 
{'sequence': '<s> अमदावाद ए गुजरातनुं एक महानगर छे.</s>', 'score': 0.21455222368240356, 'token': 122519, 'token_str': '▁महानगर'}, 
{'sequence': '<s> अमदावाद ए गुजरातनुं एक राज्य छे.</s>', 'score': 0.16832049190998077, 'token': 10665, 'token_str': '▁राज्य'}, 
{'sequence': '<s> अमदावाद ए गुजरातनुं एक जिल्ला छे.</s>', 'score': 0.06764694303274155, 'token': 20396, 'token_str': '▁जिल्ला'}, 
{'sequence': '<s> अमदावाद ए गुजरातनुं एक शहर छे.</s>', 'score': 0.05364946648478508, 'token': 22770, 'token_str': '▁शहर'}]

Using the model to generate contextualised word representations

from transformers import AutoTokenizer, AutoModel
tokenizer = AutoTokenizer.from_pretrained("ashwani-tanwar/Gujarati-in-Devanagari-XLM-R-Base")
model = AutoModel.from_pretrained("ashwani-tanwar/Gujarati-in-Devanagari-XLM-R-Base")
sentence = "अमदावाद ए गुजरातनुं एक शहेर छे."
encoded_sentence = tokenizer(sentence, return_tensors='pt')
context_word_rep = model(**encoded_sentence)