About: http://webisa.webdatacommons.org/394318767

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	An exacerbation is a sudden appearance or worsening of one or more symptoms of multiple sclerosis such as difficulty walking or blurred vision that lasts for atleast 24 hours and sometimes can last for weeks or even months.
http://www.w3.org/ns/prov#wasQuotedFrom	seekingalpha.com