About: http://webisa.webdatacommons.org/199347718

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	Not really the er4s fault, but I am guessing moisture is trapped, combined with any sort of pressure or vacuum they create, causing the issue.
http://www.w3.org/ns/prov#wasQuotedFrom	head-fi.org