{bs,hr,sr}WaC - Web Corpora of Bosnian, Croatian and Serbian

Nikola Ljubesic,Filip Klubicka

Published 2014 in WaC@EACL

ABSTRACT

In this paper we present the construction process of top-level-domain web corpora of Bosnian, Croatian and Serbian. For constructing the corpora we use the SpiderLing crawler with its associated tools adapted for simultaneous crawling and processing of text written in two scripts, Latin and Cyrillic. In addition to the modified collection process we focus on two sources of noise in the resulting corpora: 1. they contain documents written in the other, closely related languages that can not be identified with standard language identification methods and 2. as most web corpora, they partially contain low-quality data not suitable for the specific research and application objectives. We approach both problems by using language modeling on the crawled data only, omitting the need for manually validated language samples for training. On the task of discriminating between closely related languages we outperform the state-of-the-art Blacklist classifier reducing its error to a fourth.

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