Funding for this research was provided by:
Microsoft Research (PhD Scholarship)
RCUK | Engineering and Physical Sciences Research Council (EP/K011766/1, EP/N019423/1)
MOD | Defence Science and Technology Laboratory (EP/N019423/1)
RCUK | Arts and Humanities Research Council (AH/N006011/1)
Article History
Received: 27 February 2019
Accepted: 26 July 2019
First Online: 29 August 2019
Competing Interests
: The authors declare no competing interests.