Аннотация
For MUC-7, BBN has for the first time fielded a
fully-trained system for NE, TE, and TR; results are
all the output of statistical language models trained
on annotated data, rather than programs executing
handwritten rules. Such trained systems have some
significant advantages: . They can be easily ported to
new domains by simply annotating data with semantic
answers. . The complex interactions that make
rule-based systems difficult to develop and maintain
can here be learned automatically from the training
data. We believe that the results in this evaluation
are evidence that such trained systems, even at their
current level of development, can perform roughly on a
par with rules hand-tailored by experts. Since MUC-3,
BBN has been steadily increasing the proportion of the
information extraction process that is statistically
trained. Already in MET-1, our name-finding results
were the output of a fully statistical, HMM-based
model, and that statistical Identifinder^TM model was
als...
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