Tweety at SemEval-2018 Task 2: Predicting Emojis using Hierarchical Attention Neural Networks and Support Vector Machine
Daniel Kopev, Atanas Todorov Atanasov, Dimitrina Zlatkova, Momchil Hardalov, Ivan Koychev, Ivelina Nikolova, Galia Angelova · 2018
We present the system built for SemEval-2018 Task 2 on Emoji Prediction.Although Twitter messages are very short we managed to design a wide variety of features: textual, semantic, sentiment, emotion-, and colorrelated ones.We investigated different methods of text preprocessing including replacing text emojis with respective tokens and splitting hashtags to capture more meaning.To represent text we used word n-grams and word embeddings.We experimented with a wide range of classifiers and our best results were achieved using a SVM-based classifier and a Hierarchical Attention Neural Network.