yhavinga/t5-v1.1-base-dutch-cnn-test

T5 v1.1 Base finetuned for CNN news summarization in Dutch 🇳🇱

This model is t5-v1.1-base-dutch-cased finetuned on CNN Dailymail NL

For a demo of the Dutch CNN summarization models, head over to the Hugging Face Spaces for the Netherformer 📰 example application!

Rouge scores for this model are listed below.

Tokenizer

• SentencePiece tokenizer trained from scratch for Dutch on mC4 nl cleaned with scripts from the Huggingface Transformers Flax examples.

Dataset

All models listed below are trained on of the full configuration (39B tokens) of cleaned Dutch mC4, which is the original mC4, except

• Documents that contained words from a selection of the Dutch and English List of Dirty Naught Obscene and Otherwise Bad Words are removed
• Sentences with less than 3 words are removed
• Sentences with a word of more than 1000 characters are removed
• Documents with less than 5 sentences are removed
• Documents with "javascript", "lorum ipsum", "terms of use", "privacy policy", "cookie policy", "uses cookies", "use of cookies", "use cookies", "elementen ontbreken", "deze printversie" are removed.

Models

TL;DR: yhavinga/t5-v1.1-base-dutch-cased is the best model.

• yhavinga/t5-base-dutch is a re-training of the Dutch T5 base v1.0 model trained during the summer 2021 Flax/Jax community week. Accuracy was improved from 0.64 to 0.70.
• The two T5 v1.1 base models are an uncased and cased version of t5-v1.1-base, again pre-trained from scratch on Dutch, with a tokenizer also trained from scratch. The t5 v1.1 models are slightly different from the t5 models, and the base models are trained with a dropout of 0.0. For fine-tuning it is intended to set this back to 0.1.
• The large cased model is a pre-trained Dutch version of t5-v1.1-large. Training of t5-v1.1-large proved difficult. Without dropout regularization, the training would diverge at a certain point. With dropout training went better, be it much slower than training the t5-model. At some point convergance was too slow to warrant further training. The latest checkpoint, training scripts and metrics are available for reference. For actual fine-tuning the cased base model is probably the better choice.

	model	train seq len	acc	loss	batch size	epochs	steps	dropout	optim	lr	duration
yhavinga/t5-base-dutch	T5	512	0,70	1,38	128	1	528481	0.1	adafactor	5e-3	2d 9h
yhavinga/t5-v1.1-base-dutch-uncased	t5-v1.1	1024	0,73	1,20	64	2	1014525	0.0	adafactor	5e-3	5d 5h
yhavinga/t5-v1.1-base-dutch-cased	t5-v1.1	1024	0,78	0,96	64	2	1210000	0.0	adafactor	5e-3	6d 6h
yhavinga/t5-v1.1-large-dutch-cased	t5-v1.1	512	0,76	1,07	64	1	1120000	0.1	adafactor	5e-3	86 13h

The cased t5-v1.1 Dutch models were fine-tuned on summarizing the CNN Daily Mail dataset.

	model	input len	target len	Rouge1	Rouge2	RougeL	RougeLsum	Test Gen Len	epochs	batch size	steps	duration
yhavinga/t5-v1.1-base-dutch-cnn-test	t5-v1.1	1024	96	34,8	13,6	25,2	32,1	79	6	64	26916	2h 40m
yhavinga/t5-v1.1-large-dutch-cnn-test	t5-v1.1	1024	96	34,4	13,6	25,3	31,7	81	5	16	89720	11h

Acknowledgements

This project would not have been possible without compute generously provided by Google through the TPU Research Cloud. The HuggingFace 🤗 ecosystem was also instrumental in many, if not all parts of the training. The following repositories where helpful in setting up the TPU-VM, and training the models:

• Gsarti's Pretrain and Fine-tune a T5 model with Flax on GCP
• HUggingFace Flax MLM examples
• Flax/Jax Community week t5-base-dutch

Created by Yeb Havinga