About: http://webisa.webdatacommons.org/180585397

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	The subclass is tightly coupled to its parent because of the is a relationship.In your example, there is nothing wrong with the coupling between dog and pet, or cat and pet.
http://www.w3.org/ns/prov#wasQuotedFrom	artima.com