Classifier Instance:

Anchor text: Earth
Target Entity: Earth
Preceding Context: With this work under his belt, Bessel was able to achieve the feat for which he is best remembered today: he is credited with being the first to use parallax in calculating the distance to a star. Astronomers had believed for some time that parallax would provide the first accurate measurement of interstellar distances—in fact, in the 1830s there was a fierce competition between astronomers to be the first to measure a stellar parallax accurately. In 1838 Bessel won the race, announcing that 61 Cygni had a parallax of 0.314 arcseconds; which, given the diameter of the
Succeeding Context: 's orbit, indicated that the star is 10.4 ly away. If the currently accepted figure of 11.4 ly (see 61 Cygni and discussion page) is correct, Bessel's figure had an error of 8.8%. He narrowly beat Friedrich Georg Wilhelm Struve and Thomas Henderson, who measured the parallaxes of Vega and Alpha Centauri in the same year.
Paragraph Title: Life and work
Source Page: Friedrich Bessel

Ground Truth Types:

Predicted Types:

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