Researchers at Google annotated English-language Web pages from the ClueWeb09 and ClueWeb12 corpora. The annotation process was automatic, and hence imperfect. However, the annotations are of generally high quality, as they strove for high precision (and, by necessity, lower recall). For each entity they recognized with high confidence, they provide the beginning and end byte offsets of the entity mention in the input text, its Freebase identifier (mid), and two confidence levels (computed differently, see below).
You might consider using this data in conjunction with the recently released Freebase annotations of several TREC query sets.
. In more recent times, scientist have harnessed the power of the public not only to collect data on a larger scale than perhaps would otherwise be possible, but also to analyse data gathered by professional researchers. Such data analysis projects include Zooniverse’s Galaxy Zoo and Cell Slider projects, whilst WheelMap, Wide Noise and the Opal Tree Health Survey focus on data collection.
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