Mikhail Arkhipov


Tuning Multilingual Transformers for Language-Specific Named Entity Recognition
Mikhail Arkhipov | Maria Trofimova | Yuri Kuratov | Alexey Sorokin
Proceedings of the 7th Workshop on Balto-Slavic Natural Language Processing

Our paper addresses the problem of multilingual named entity recognition on the material of 4 languages: Russian, Bulgarian, Czech and Polish. We solve this task using the BERT model. We use a hundred languages multilingual model as base for transfer to the mentioned Slavic languages. Unsupervised pre-training of the BERT model on these 4 languages allows to significantly outperform baseline neural approaches and multilingual BERT. Additional improvement is achieved by extending BERT with a word-level CRF layer. Our system was submitted to BSNLP 2019 Shared Task on Multilingual Named Entity Recognition and demonstrated top performance in multilingual setting for two competition metrics. We open-sourced NER models and BERT model pre-trained on the four Slavic languages.


DeepPavlov: Open-Source Library for Dialogue Systems
Mikhail Burtsev | Alexander Seliverstov | Rafael Airapetyan | Mikhail Arkhipov | Dilyara Baymurzina | Nickolay Bushkov | Olga Gureenkova | Taras Khakhulin | Yuri Kuratov | Denis Kuznetsov | Alexey Litinsky | Varvara Logacheva | Alexey Lymar | Valentin Malykh | Maxim Petrov | Vadim Polulyakh | Leonid Pugachev | Alexey Sorokin | Maria Vikhreva | Marat Zaynutdinov
Proceedings of ACL 2018, System Demonstrations

Adoption of messaging communication and voice assistants has grown rapidly in the last years. This creates a demand for tools that speed up prototyping of feature-rich dialogue systems. An open-source library DeepPavlov is tailored for development of conversational agents. The library prioritises efficiency, modularity, and extensibility with the goal to make it easier to develop dialogue systems from scratch and with limited data available. It supports modular as well as end-to-end approaches to implementation of conversational agents. Conversational agent consists of skills and every skill can be decomposed into components. Components are usually models which solve typical NLP tasks such as intent classification, named entity recognition or pre-trained word vectors. Sequence-to-sequence chit-chat skill, question answering skill or task-oriented skill can be assembled from components provided in the library.