Text and Data Mining valid from 2018-02-09
Received: 11 August 2017
Accepted: 17 January 2018
First Online: 9 February 2018
Change Date: 3 September 2018
Change Type: Correction
Change Details: The original version of this article, published on 9 February 2018, contained the following errors. In this Correction, the affected parts of the article are shown. The list of references is available in the original article.
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