Assertion: quotation mark | /r/HasProperty | colin clair
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Source sentences:
text: The early 1500s was when printers began to move away from printing works intended to resemble manuscripts, and quotation marks thus seem to be an aspect of that liberation: Colin Clair, A History of European printing (London, 1976), writes both that the liberating process took nearly a century from the invention of printing (p. 21), and also that it took only until around 1520 for printed books to free themselves (p. 126).