@Article{WieKle2013,
        AUTHOR = {Wiegand, Michael and Klenner, Manfred and Klakow, Dietrich},
        TITLE = {Bootstrapping polarity classifiers with rule-based classification},
        YEAR = {2013},
        JOURNAL = {Language resources and evaluation},
        VOLUME = {47},
        NUMBER = {4},
        PAGES = {1049-1088},
        NOTE = {DK} }
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