Funding for this research was provided by:
Fondazione Cassa di Risparmio di Padova e Rovigo (Starting Grant)
Text and Data Mining valid from 2018-09-03
Received: 20 April 2018
Accepted: 22 August 2018
First Online: 3 September 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.