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README.md
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---
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license: cc
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language:
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- en
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---
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This is the proposition segmentation model from "Sub-Sentence Encoder: Contrastive Learning of Propositional Semantic Representations" by Chen et. al. 2023.
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## Usage
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The prompt to the model is formatted like: `segment sentence: {input_sentence}`.
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For each sentence, the model will output the propositions concatenated by `[sep]` as a string.
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For example, if we use the following example code to segment `"Dracula is a novel by Bram Stoker featuring Count Dracula as the protagonist."`.
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The model output will be `['Dracula is a novel by Bram Stoker.[sep]Count Dracula is the protagonist of Dracula.']`
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```
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from transformers import AutoTokenizer, AutoModelForSeq2SeqLM
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gen_kwargs = {
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"length_penalty": 0,
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"max_new_tokens": 256,
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"min_length": 10,
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"no_repeat_ngram_size": 0,
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"num_beams": 1,
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}
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SEGMENT5_PROMPT = "segment sentence: {}"
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SEGMENT5_SEP_TOKEN = "[sep]"
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model = AutoModelForSeq2SeqLM.from_pretrained("sihaochen/SegmenT5-large")
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tokenizer = AutoTokenizer.from_pretrained("sihaochen/SegmenT5-large")
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model.eval()
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# define an example input sentence
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example_sentence = "Dracula is a novel by Bram Stoker featuring Count Dracula as the protagonist."
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example_input = SEGMENT5_PROMPT.format(example_sentence)
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input_ids = tokenizer(example_input,
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return_tensors="pt",
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padding="max_length",
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max_length=512,
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truncation=True).input_ids
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logits = model.generate(input_ids, **gen_kwargs)
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outputs = tokenizer.batch_decode(logits, skip_special_tokens=True)
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output = outputs[0].split(SEGMENT5_SEP_TOKEN)
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print(output)
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# Output: ['Dracula is a novel by Bram Stoker.', 'Count Dracula is the protagonist of Dracula.']
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```
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## Sub-Sentence Encoder
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For model checkpoints + code for the sub-sentence encoders, checkout: https://github.com/schen149/sub-sentence-encoder/
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## Citation
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```
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@article{chen2023subsentence,
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title={Sub-Sentence Encoder: Contrastive Learning of Propositional Semantic Representations},
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author={Sihao Chen and Hongming Zhang and Tong Chen and Ben Zhou and Wenhao Yu and Dian Yu and Baolin Peng and Hongwei Wang and Dan Roth and Dong Yu},
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journal={arXiv preprint arXiv:2311.04335},
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year={2023},
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URL = {https://arxiv.org/pdf/2311.04335.pdf}
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}
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```
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