About: http://webisa.webdatacommons.org/388066683

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	But one consistent challenge for existing robots is walking on shifting surfaces such as sand.
http://www.w3.org/ns/prov#wasQuotedFrom	discovermagazine.com