About: http://webisa.webdatacommons.org/137935203

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	There may be varying numbers of balls, for example as many as six balls may be contacted to the top platform and six balls may be contacted the bottom platform as shown in FIGS. 3 and 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com