About: http://webisa.webdatacommons.org/322047508

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	Metropolitan municipalities in the 19th century were spurred to clean up their cities in order to combat the spread of disease, especially at first in port cities such as New York, Philadelphia, San Francisco, and New Orleans.
http://www.w3.org/ns/prov#wasQuotedFrom	teachinghistory.org