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End-to-end Korean Document Summarization using Copy Mechanism and Input-feeding
In this paper, the copy mechanism and input feeding are applied to recurrent neural network(RNN)-search model in a Korean-document summarization in an end-to-end manner. In addition, the performances of the document summarizations are compared according to the model and the tokenization format; accordingly, the syllable-unit, morpheme-unit, and hybrid-unit tokenization formats are compared. For the experiments, Internet newspaper articles were collected to construct a Korean-document summary data set (train set: 30291 documents; development set: 3786 documents; test set: 3705 documents). When the format was tokenized as the morpheme-unit, the models with the input feeding and the copy mechanism showed the highest performances of ROUGE-1 35.92, ROUGE-215.37, and ROUGE-L 29.45.
Korean Coreference Resolution using the Multi-pass Sieve
Cheon-Eum Park, Kyoung-Ho Choi, Changki Lee
Coreference resolution finds all expressions that refer to the same entity in a document. Coreference resolution is important for information extraction, document classification, document summary, and question answering system. In this paper, we adapt Stanford`s Multi-pass sieve system, the one of the best model of rule based coreference resolution to Korean. In this paper, all noun phrases are considered to mentions. Also, unlike Stanford`s Multi-pass sieve system, the dependency parse tree is used for mention extraction, a Korean acronym list is built ‘dynamically’. In addition, we propose a method that calculates weights by applying transitive properties of centers of the centering theory when refer Korean pronoun. The experiments show that our system obtains MUC 59.0%, B3 59.5%, Ceafe 63.5%, and CoNLL(Mean) 60.7%.
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