About: http://webisa.webdatacommons.org/406651476

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	These cavities are abundant but limited in size, thus only small molecules such as hydrogen (H2) or carbon dioxide (CO2) can be guests.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsworld.com