Funding for this research was provided by:
Regione Autonoma Friuli Venezia Giulia (paragraphs 6-10. Pr, LR 29 Dec 2016, art. 3, n. 25)
Provincia Autonoma di Trento (PhD scholarship (D.S.), ADP 2017 project)
Text and Data Mining valid from 2019-07-31
Received: 13 April 2019
Revised: 16 July 2019
Accepted: 20 July 2019
First Online: 31 July 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This research was carried out in compliance with ethical standards.