Prompt-based event argument extraction method and system
An argument and event technology, applied in the field of event argument extraction, can solve problems such as the inability to meet the efficiency and accuracy requirements of event arguments at the same time, and achieve the effect of meeting the needs of accurate identification
Pending Publication Date: 2022-08-09
NAT UNIV OF DEFENSE TECH
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[0004] The existing prompt-based event argument extraction method cannot meet the efficiency and accuracy requirements of event argument extraction at the same time
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[0070] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0071] When it is necessary to extract event arguments based on prompts, the model can be trained in advance, wherein the model training phase includes training of entity recognition models and training of event argument extraction models through Prompts.
[0072] Among them, the entity recognition model training is to convert the original text X={x 1 ,x 2 ,...,x n } input into the entity recognition model, and use the real entity s...
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The invention discloses a prompt-based event argument extraction method and system, and the method comprises the steps: inputting an original text into an entity recognition model which is trained in advance, and carrying out the recognition to obtain all entities in the original text and the starting positions and ending positions span of the entities in the original text; inputting the original text into an event argument extraction model which is trained through Prompts in advance, and identifying to obtain an argument role type to which each entity in the original text belongs; and correcting the argument span of the argument role based on the argument role type to which each entity in the original text belongs. When the event argument is extracted, the generated prompt can record the trigger word information, the event type information, the event multi-argument information and the event multi-argument role information at the same time, and then the accurate recognition requirement of the event argument multi-role is met.
Description
technical field [0001] The invention relates to the technical field of event argument extraction, in particular to a prompt-based event argument extraction method and system. Background technique [0002] With the rapid development of the Internet and a large number of applications, massive amounts of unstructured text data have been generated. If these scattered and different forms of document information can be extracted and stored as a standardized structure, the significance will be very significant. For applications in military, commercial, medical and other fields, obtaining useful information from massive information in the corresponding fields helps users to learn the development trend of similar events from the evolution process of historical events, and helps users take corresponding measures in a timely manner. Human search is the traditional method of information collection. For example, a professional team consults a large amount of multimodal data, and the dev...
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IPC IPC(8): G06F16/33G06F40/279G06K9/62G06N3/04
CPCG06F40/279G06F16/334G06N3/044G06F18/214
Inventor 李海莉周云彦董深泼涂宏魁王晓东李东升陈飞常韬蔡蕾白皓徐秋波李敏裕贾腾飞李林燕
Owner NAT UNIV OF DEFENSE TECH