Peter Krejzl


2017

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Cross-lingual Flames Detection in News Discussions
Josef Steinberger | Tomáš Brychcín | Tomáš Hercig | Peter Krejzl
Proceedings of the International Conference Recent Advances in Natural Language Processing, RANLP 2017

We introduce Flames Detector, an online system for measuring flames, i.e. strong negative feelings or emotions, insults or other verbal offences, in news commentaries across five languages. It is designed to assist journalists, public institutions or discussion moderators to detect news topics which evoke wrangles. We propose a machine learning approach to flames detection and calculate an aggregated score for a set of comment threads. The demo application shows the most flaming topics of the current period in several language variants. The search functionality gives a possibility to measure flames in any topic specified by a query. The evaluation shows that the flame detection in discussions is a difficult task, however, the application can already reveal interesting information about the actual news discussions.

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Pyramid-based Summary Evaluation Using Abstract Meaning Representation
Josef Steinberger | Peter Krejzl | Tomáš Brychcín
Proceedings of the International Conference Recent Advances in Natural Language Processing, RANLP 2017

We propose a novel metric for evaluating summary content coverage. The evaluation framework follows the Pyramid approach to measure how many summarization content units, considered important by human annotators, are contained in an automatic summary. Our approach automatizes the evaluation process, which does not need any manual intervention on the evaluated summary side. Our approach compares abstract meaning representations of each content unit mention and each summary sentence. We found that the proposed metric complements well the widely-used ROUGE metrics.

2016

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UWB at SemEval-2016 Task 6: Stance Detection
Peter Krejzl | Josef Steinberger
Proceedings of the 10th International Workshop on Semantic Evaluation (SemEval-2016)