Text and Data Mining valid from 2019-12-24
Accepted: 26 November 2019
First Online: 24 December 2019
Change Date: 8 January 2020
Change Type: Correction
Change Details: The Publisher would like to correct the introduced formatting errors caused by production on figures 16 and 23 of the original article. The errors are purely typesetting mistakes and the corrections made to the figures did not impact upon the veracity and content of the overall text of the article in any way.
Compliance with ethical standards
: The authors declare that they have no conflict of interest.