| 摘要 |
A data analyzer apparatus comprises a document storage device storing a set of documents containing attributes representing text data and time data, a key concept dictionary storage device storing a key concept dictionary, a selector selecting a subset of documents from the set of documents in accordance with a given combination of the attributes, a first extraction device extracting a set of key concepts from each document belonging to the subset selected, based on the key concept dictionary, a second extraction device extracting the time data from each document belonging to the subset selected, and a concept sequence generator generating concept sequence including key concepts extracted from each document belonging to the subset using the time data.
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