To determine the influence of the LDA topic parameter <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">t</hi> and different preprocessing procedures we report accuracy for <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">t </hi>=10, 70, 100 and 200 (see figure 1). Differences between different preprocessing categories are minimal, but removal of named entities seems to improve results overall. We observe comparable result for <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">t</hi> =10, 70 and 100 and a drop in performance for <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">t</hi> = 200. Therefore, we will use LDA with lemmatized words and named entities removed for <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">t</hi> = 100 in the following experiments.