In-depth Question classification using Convolutional Neural Networks
This addresses question classification in NLP, but it appears incremental as it adapts CNNs from vision to text without major breakthroughs.
The paper tackles question classification by using convolutional neural networks (CNNs) to predict a question's primary topic and then separate networks for sub-topic classification, aiming for good results in less time.
Convolutional neural networks for computer vision are fairly intuitive. In a typical CNN used in image classification, the first layers learn edges, and the following layers learn some filters that can identify an object. But CNNs for Natural Language Processing are not used often and are not completely intuitive. We have a good idea about what the convolution filters learn for the task of text classification, and to that, we propose a neural network structure that will be able to give good results in less time. We will be using convolutional neural networks to predict the primary or broader topic of a question, and then use separate networks for each of these predicted topics to accurately classify their sub-topics.