Classifier Instance:

Anchor text: SIMS
Target Entity: Secondary_ion_mass_spectrometry
Preceding Context: Uranium-lead dating is often performed on the mineral zircon (ZrSiO 4 ), though it can be used on other materials, such as baddeleyite. Zircon and baddeleyite incorporate uranium atoms into their crystalline structure as substitutes for zirconium, but strongly reject lead. It has a very high closure temperature, is resistant to mechanical weathering and is very chemically inert. Zircon also forms multiple crystal layers during metamorphic events, which each may record an isotopic age of the event. In situ micro-beam analysis can be achieved via laser ICP-MS or
Succeeding Context: techniques.
Paragraph Title: Uranium-lead dating method
Source Page: Radiometric dating

Ground Truth Types:

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Predicted Types:

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wordnet_person_100007846-0.127613853570607 0
yagoGeoEntity-0.9611448558542435 0
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