Funding for this research was provided by:
Air Force Research Laboratory (FA8651-16-2-0009)
European Office of Aerospace Research and Development (FA9550-17-1-0030)
Text and Data Mining valid from 2020-01-06
Received: 14 June 2019
Accepted: 16 December 2019
First Online: 6 January 2020
: The authors declare that they have no competing interests.