This HTML5 document contains 6 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n5saveyourheritage.
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isap:491643828
prov:wasDerivedFrom
isa:76994130
Subject Item
isa:76994130
rdf:type
prov:Entity
prov:value
Crops such as sugar cane, tobacco and cotton required an unlimited and inexpensive supply of strong backs to assure timely production for the European market.
prov:wasQuotedFrom
n5:com
Subject Item
isap:172900936
prov:wasDerivedFrom
isa:76994130
Subject Item
isap:75297317
prov:wasDerivedFrom
isa:76994130