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Register a new userYNU-HPCC at SemEval-2021 Task 11: Using a BERT Model to Extract Contributions from NLP Scholarly Articles
YNU-HPCC في مهمة Semeval-2021: استخدام نموذج BERT لاستخراج المساهمات من المقالات العلمية NLP
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تصف هذه الورقة النظام الذي بنناه كفريق YNU-HPCC في مهمة Semeval-2021 11: NLPContribeGraph. تتضمن هذه المهمة أولا تحديد الجمل في المقالات العلمية المعينة للغة الطبيعية (NLP) التي تعكس مساهمات البحث من خلال التصنيف الثنائي؛ ثم تحديد المصطلحات العلمية الأساسية وعبارات علاقتها من جمل هذه المساهمة عن طريق وضع التسلسل؛ وأخيرا، يتم تصنيف هذه المصطلحات والعلاقات العلمية هذه، وحددها، ويتم تنظيمها في ثلاثة أضعاف ثلاثة أضعاف لتشكيل رسم بياني للمعرفة بمساعدة تصنيف Multiclass وتصنيف متعدد التسميات. قمنا بتطوير نظام لهذه المهمة باستخدام نموذج تمثيل لغوي مدرب مسبقا يسمى Bert الذي يمثل تمثيلات تشفير ثنائية الاتجاه من المحولات، وحقق نتائج جيدة. متوسط درجة F1 للتقييم المرحلة 2، الجزء الأول كان 0.4562 واحتل المرتبة 7، ومتوسط درجة F1 لمرحلة التقييم 2، الجزء الثاني كان 0.6541، وأيضا المرتبة 7.
This paper describes the system we built as the YNU-HPCC team in the SemEval-2021 Task 11: NLPContributionGraph. This task involves first identifying sentences in the given natural language processing (NLP) scholarly articles that reflect research contributions through binary classification; then identifying the core scientific terms and their relation phrases from these contribution sentences by sequence labeling; and finally, these scientific terms and relation phrases are categorized, identified, and organized into subject-predicate-object triples to form a knowledge graph with the help of multiclass classification and multi-label classification. We developed a system for this task using a pre-trained language representation model called BERT that stands for Bidirectional Encoder Representations from Transformers, and achieved good results. The average F1-score for Evaluation Phase 2, Part 1 was 0.4562 and ranked 7th, and the average F1-score for Evaluation Phase 2, Part 2 was 0.6541, and also ranked 7th.
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We propose a cascade of neural models that performs sentence classification, phrase recognition, and triple extraction to automatically structure the scholarly contributions of NLP publications. To identify the most important contribution sentences i
n a paper, we used a BERT-based classifier with positional features (Subtask 1). A BERT-CRF model was used to recognize and characterize relevant phrases in contribution sentences (Subtask 2). We categorized the triples into several types based on whether and how their elements were expressed in text, and addressed each type using separate BERT-based classifiers as well as rules (Subtask 3). Our system was officially ranked second in Phase 1 evaluation and first in both parts of Phase 2 evaluation. After fixing a submission error in Pharse 1, our approach yields the best results overall. In this paper, in addition to a system description, we also provide further analysis of our results, highlighting its strengths and limitations. We make our code publicly available at https://github.com/Liu-Hy/nlp-contrib-graph.
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This paper describes the winning system in the End-to-end Pipeline phase for the NLPContributionGraph task. The system is composed of three BERT-based models and the three models are used to extract sentences, entities and triples respectively. Exper
iments show that sampling and adversarial training can greatly boost the system. In End-to-end Pipeline phase, our system got an average F1 of 0.4703, significantly higher than the second-placed system which got an average F1 of 0.3828.
Research in Natural Language Processing is making rapid advances, resulting in the publication of a large number of research papers. Finding relevant research papers and their contribution to the domain is a challenging problem. In this paper, we add
ress this challenge via the SemEval 2021 Task 11: NLPContributionGraph, by developing a system for a research paper contributions-focused knowledge graph over Natural Language Processing literature. The task is divided into three sub-tasks: extracting contribution sentences that show important contributions in the research article, extracting phrases from the contribution sentences, and predicting the information units in the research article together with triplet formation from the phrases. The proposed system is agnostic to the subject domain and can be applied for building a knowledge graph for any area. We found that transformer-based language models can significantly improve existing techniques and utilized the SciBERT-based model. Our first sub-task uses Bidirectional LSTM (BiLSTM) stacked on top of SciBERT model layers, while the second sub-task uses Conditional Random Field (CRF) on top of SciBERT with BiLSTM. The third sub-task uses a combined SciBERT based neural approach with heuristics for information unit prediction and triplet formation from the phrases. Our system achieved F1 score of 0.38, 0.63 and 0.76 in end-to-end pipeline testing, phrase extraction testing and triplet extraction testing respectively.
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