This HTML5 document contains 4 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/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n5slate.
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:225467275
rdf:type
prov:Entity
prov:value
Though chemicals including tear gas and sneezing powder were used in the early days of World War I, the first mass gas attack in history was carried out by German forces at the Battle of Ypres, in Western Belgium, on April 22, 1915???and chlorine was the weapon of choice.
prov:wasQuotedFrom
n5:com
Subject Item
isap:329940202
prov:wasDerivedFrom
isa:225467275