Classifier Instance:

Anchor text: James Chalmers
Target Entity: James_Chalmers_\u0028inventor\u0029
Preceding Context: The claim that the Scotsman
Succeeding Context: was the inventor of the postage stamp first surfaced in 1881 when the book "The Penny Postage Scheme of 1837", written by his son, Patrick Chalmers, was published. In this book, the son claims that James Chalmers first produced an essay describing and advocating a stamp in August 1834. However, no evidence for this is provided in the book. Patrick Chalmers continued to campaign until he died in 1891 to have his father recognised as the inventor of the postage stamp.
Paragraph Title: null
Source Page: Postage stamp

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