Sentence:  A second period, the <WSD>graphosphere</WSD>, runs from 1448 to around 1968: from the Gutenberg Revolution to the rise of TV. 
Meaning of the word marked with <WSD> tags:  The age of print (following the (logosphere), or age of writing, and preceding the (videosphere)).<ref>Debray (2007), cited in Simon Franklin, 2011, "[https://muse.jhu.edu/article/448210 Mapping the Graphosphere: Cultures of Writing in Early 19th-Century Russia (and Before)]," "Kritika: Explorations in Russian and Eurasian History", Vol. 12, No. 3, Summer 2011</ref>