About: http://webisa.webdatacommons.org/335502280

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	Assuming Phobos is a captured asteroid, over billions of years its own gravity would tend to shift rubble to fill the voids.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com