Learning from Big Data: 40 Million Entities in Context

Learning from Big Data: 40 Million Entities in Context by Dave Orr, Amar Subramanya, and Fernando Pereira, Google Research,

A fuller explanation of the Wikilinks Corpus from Google:

When someone mentions Mercury, are they talking about the planet, the god, the car, the element, Freddie, or one of some 89 other possibilities? This problem is called disambiguation (a word that is itself ambiguous), and while it’s necessary for communication, and humans are amazingly good at it (when was the last time you confused a fruit with a giant tech company?), computers need help.

To provide that help, we are releasing the Wikilinks Corpus: 40 million total disambiguated mentions within over 10 million web pages — over 100 times bigger than the next largest corpus (about 100,000 documents, see the table below for mention and entity counts). The mentions are found by looking for links to Wikipedia pages where the anchor text of the link closely matches the title of the target Wikipedia page. If we think of each page on Wikipedia as an entity (an idea we’ve discussed before), then the anchor text can be thought of as a mention of the corresponding entity.

Suggestions for using the data? The authors have those as well:

What might you do with this data? Well, we’ve already written one ACL paper on cross-document co-reference (and received lots of requests for the underlying data, which partly motivates this release). And really, we look forward to seeing what you are going to do with it! But here are a few ideas:

  • Look into coreference — when different mentions mention the same entity — or entity resolution — matching a mention to the underlying entity
  • Work on the bigger problem of cross-document coreference, which is how to find out if different web pages are talking about the same person or other entity
  • Learn things about entities by aggregating information across all the documents they’re mentioned in
  • Type tagging tries to assign types (they could be broad, like person, location, or specific, like amusement park ride) to entities. To the extent that the Wikipedia pages contain the type information you’re interested in, it would be easy to construct a training set that annotates the Wikilinks entities with types from Wikipedia.
  • Work on any of the above, or more, on subsets of the data. With existing datasets, it wasn’t possible to work on just musicians or chefs or train stations, because the sample sizes would be too small. But with 10 million Web pages, you can find a decent sampling of almost anything.

Those all sound like topic map tasks to me, especially if you capture your coreference results for merging with other coreference results.

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