Black holes and white rabbits metaphor identification with visual featuresSumit Maharjan
E. Shutova, D. Kiela, and J. Maillard. Black holes and
white rabbits: Metaphor identification with visual
features. In Proc. of the 2016 Conference of the North
American Chapter of the Association for
Computational Linguistics: Human Language
Technologies, pages 160–170, San Diego, California,
June 2016. Association for Computational Linguistics
Abstract:
Sarcasm is a peculiar form of sentiment expression, where the surface sentiment differs from the implied sentiment. The detection of sarcasm in social media platforms has been applied in the past mainly to textual utterances where lex- ical indicators (such as interjections and intensifiers), lin- guistic markers, and contextual information (such as user profiles, or past conversations) were used to detect the sar- castic tone. However, modern social media platforms allow to create multimodal messages where audiovisual content is integrated with the text, making the analysis of a mode in isolation partial. In our work, we first study the relation- ship between the textual and visual aspects in multimodal posts from three major social media platforms, i.e., Insta- gram, Tumblr and Twitter, and we run a crowdsourcing task to quantify the extent to which images are perceived as necessary by human annotators. Moreover, we propose two different computational frameworks to detect sarcasm that integrate the textual and visual modalities. The first approach exploits visual semantics trained on an external dataset, and concatenates the semantics features with state- of-the-art textual features. The second method adapts a vi- sual neural network initialized with parameters trained on ImageNet to multimodal sarcastic posts. Results show the positive effect of combining modalities for the detection of sarcasm across platforms and methods.
Black holes and white rabbits metaphor identification with visual featuresSumit Maharjan
E. Shutova, D. Kiela, and J. Maillard. Black holes and
white rabbits: Metaphor identification with visual
features. In Proc. of the 2016 Conference of the North
American Chapter of the Association for
Computational Linguistics: Human Language
Technologies, pages 160–170, San Diego, California,
June 2016. Association for Computational Linguistics
Abstract:
Sarcasm is a peculiar form of sentiment expression, where the surface sentiment differs from the implied sentiment. The detection of sarcasm in social media platforms has been applied in the past mainly to textual utterances where lex- ical indicators (such as interjections and intensifiers), lin- guistic markers, and contextual information (such as user profiles, or past conversations) were used to detect the sar- castic tone. However, modern social media platforms allow to create multimodal messages where audiovisual content is integrated with the text, making the analysis of a mode in isolation partial. In our work, we first study the relation- ship between the textual and visual aspects in multimodal posts from three major social media platforms, i.e., Insta- gram, Tumblr and Twitter, and we run a crowdsourcing task to quantify the extent to which images are perceived as necessary by human annotators. Moreover, we propose two different computational frameworks to detect sarcasm that integrate the textual and visual modalities. The first approach exploits visual semantics trained on an external dataset, and concatenates the semantics features with state- of-the-art textual features. The second method adapts a vi- sual neural network initialized with parameters trained on ImageNet to multimodal sarcastic posts. Results show the positive effect of combining modalities for the detection of sarcasm across platforms and methods.
This is a presentation that I gave to the Australian Business Arts Foundation, introducing and explaining the concept of SYN (The Student Youth Network) in Melbourne.
This is a presentation that I gave to the Australian Business Arts Foundation, introducing and explaining the concept of SYN (The Student Youth Network) in Melbourne.
Reference Scope Identification in Citing Sentences
"Joint Extraction of Events and Entities within a Document Context"の解説
1. Joint Extraction of
Events and Entities
within a Document Context
Bishan Yang, Tom Mitchell
Carnegie Mellon University の解説
亀田 尭宙
(京都大学
地域研究統合情報センター)
2. Event Extraction
“On Thursday, there was a massive U.S. aerial bombardment
in which more than 300 Tomahawk cruise missiles rained
down on Baghdad. Earlier Saturday, Baghdad was again
targeted. ...”
イベントとして
モデル化
3. “Joint” Extraction of Events and Entities
• イベント内の構造、イベント間の関連、
イベントに現れるエンティティの相関を考慮できる!
の確率
エンティティの
確信度 by CRFイベントの
ラベルペアの確率
16. エラー分析
1. “At least three members of a family ... were hacked to
death ...”,
WordNetとEmbeddingで補完してはいるけど、めずらし
い用法過ぎて学習できない。曖昧性解消も大事。
2. “She is being held on 50,000 dollars bail on a charge of first-
degree reckless homicide ...”,
長距離の係り受け。
3. 比喩、熟語、皮肉