About: http://webisa.webdatacommons.org/38632737

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 have been reports of problems with POSIXct and ggplot2 for at least six months, particularly with values that have no time portion.
http://www.w3.org/ns/prov#wasQuotedFrom	ethz.ch