Classifier Instance:

Anchor text: Song Dynasty
Target Entity: Song_Dynasty
Preceding Context: In 723 CE, Tang dynasty Buddhist monk Yi-xing (一行) and government official Liang Ling-zan (梁令瓚) combined Zhang Heng's water powered celestial globe with an escapement device. With drums hit every quarter-hour and bells rung automatically every full hour, the device was also a striking clock. The famous clock tower of the Su Song built by 1094 during the
Succeeding Context: would employ Yi Xing's escapement with waterwheel scoops filled by clepsydra drip, and powered a crowning armillary sphere, a central celestial globe, and mechanically-operated manikins that would exit mechanically-opened doors of the clock tower at specific times to ring bells and gongs to announce the time, or to hold plaques announcing special times of the day. There was also the scientist and statesman Shen Kuo (1031–1095). Being the head official for the Bureau of Astronomy, Shen Kuo was an avid scholar of astronomy, and improved the designs of several astronomical instruments: the gnomon, armillary sphere, clepsydra clock, and sighting tube fixed to observe the pole star indefinitely.
Paragraph Title: null
Source Page: Armillary sphere

Ground Truth Types:

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|  |  |  |  |  |  |---wordnet_state_108654360

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