What are the titles of the papers on Drone routines that were published in MUM in 2019?
In 2019 in Mobile and Ubiquitous Multimedia (ACM), what are the titles of the papers on Drone routines?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/mum/HoppeB0K19> <https://dblp.org/rdf/schema#publishedIn> 'MUM' . <https://dblp.org/rec/conf/mum/HoppeB0K19> <https://dblp.org/rdf/schema#yearOfPublication> '2019' . <https://dblp.org/rec/conf/mum/HoppeB0K19> <https://dblp.org/rdf/schema#title> ?answer }
<https://dblp.org/rec/conf/mum/HoppeB0K19>