Text and Data Mining valid from 2018-11-27
Received: 19 April 2018
Accepted: 9 November 2018
First Online: 27 November 2018
Change Date: 28 January 2019
Change Type: Correction
Change Details: The original version of this Article contained an error in the spelling of the author Daniel D. Liu, which was incorrectly given as Daniel Liu. This has now been corrected in both the PDF and HTML versions of the Article.
: The authors declare no competing interests.