| http://www.w3.org/ns/prov#value | - Except for fugitive slave ads, advertisements having to do with the selling or hiring of slaves, military notices, and a couple of other categories, advertisements are a sample, with e-texts for a day of advertisements produced every two weeks. [back]Two thoughtful introductions to topic modeling by and for historians are Sharon Block, Doing More with Digitization: An Introduction to Topic Modeli
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