%0 Conference Proceedings %T Exploratory Neural Relation Classification for Domain Knowledge Acquisition %A Fan, Yan %A Wang, Chengyu %A He, Xiaofeng %Y Bender, Emily M. %Y Derczynski, Leon %Y Isabelle, Pierre %S Proceedings of the 27th International Conference on Computational Linguistics %D 2018 %8 August %I Association for Computational Linguistics %C Santa Fe, New Mexico, USA %F fan-etal-2018-exploratory %X The state-of-the-art methods for relation classification are primarily based on deep neural net- works. This kind of supervised learning method suffers from not only limited training data, but also the large number of low-frequency relations in specific domains. In this paper, we propose the task of exploratory relation classification for domain knowledge harvesting. The goal is to learn a classifier on pre-defined relations and discover new relations expressed in texts. A dynamically structured neural network is introduced to classify entity pairs to a continuously expanded relation set. We further propose the similarity sensitive Chinese restaurant process to discover new relations. Experiments conducted on a large corpus show the effectiveness of our neural network, while new relations are discovered with high precision and recall. %U https://aclanthology.org/C18-1192 %P 2265-2276