[Lisa_seminaires] [TeaTalk] Jackie Cheung, June 13, Z-209, 14:00

Dzmitry Bahdanau dimabgv at gmail.com
Mar 13 Juin 14:03:57 EDT 2017


We are starting!

On Tue, 13 Jun 2017 at 11:35 Dzmitry Bahdanau <dimabgv at gmail.com> wrote:

> Hi all,
>
> Reminder - this is happening today!
>
> Dima
>
>
> On Tue, 6 Jun 2017 at 08:42 Dzmitry Bahdanau <dimabgv at gmail.com> wrote:
>
>> Hi all,
>>
>> Our next tea-talk will be given by Jackie C. K. Cheung, who is an
>> assistant professor at McGill university. It will take place at Z-209
>> (Pavillon Claire-McNicoll), on June 13, at 14:00. Hope you to see you in
>> great numbers!
>>
>> *Please note the unusual day and time of the talk!*
>>
>> *Title: *Leveraging External Knowledge for Machine Comprehension of Rare
>> Entities
>>
>> *Abstract: *Thanks to the "long tail" of natural language, entities that
>> only appear a handful of times in a training corpus account for the vast
>> majority of entities overall. Standard techniques for training word
>> embeddings such as word2vec and GloVe do not scale well to modelling these
>> entities, because they depend on having many entity or word occurrences for
>> reliable word co-occurrence statistics. We propose to use external
>> knowledge in the form of short entity definitions as a source of
>> information to train entity representations. We describe experiments in two
>> settings. In the first, we present a simple scheme for initializing entity
>> representations for knowledge base completion. In the second, we introduce
>> a new machine comprehension dataset, the Wikilinks Rare Entities data set,
>> and an accompanying entity cloze task which requires predicting rare named
>> entities in context. We describe a hierarchical double encoder model which
>> reads a text passage and an entity definition in order to predict which
>> entity fits in context. Our model substantially outperforms a number of
>> strong baselines which do not utilize entity definitions, demonstrating the
>> impact of external knowledge in making inferences about rare entities.
>>
>> *Bio:* Jackie CK Cheung is an assistant professor in the School of
>> Computer Science at McGill University. He received his Ph.D. at the
>> University of Toronto, and was awarded a Facebook Fellowship for his
>> doctoral research. He conducts research in computational semantics and
>> natural language generation, with a focus on topics such as inducing event
>> structure from distributional semantics, and automatic summarization. His
>> work is funded by the Natural Sciences and Engineering Research Council of
>> Canada (NSERC), and the Fonds de recherche du Québec - Nature et
>> technologies (FRQNT).
>>
>> Dima
>>
>
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