IUCL at SemEval-2016 Task 6: An Ensemble Model for Stance Detection in Twitter

@inproceedings{Liu2016IUCLAS,
  title={IUCL at SemEval-2016 Task 6: An Ensemble Model for Stance Detection in Twitter},
  author={Can Liu and Wen Li and Bradford Demarest and Yue (Eleanor) Chen and Sara Couture and Daniel Dakota and Nikita Haduong and Noah Kaufman and Andrew Lamont and Manan Pancholi and Kenneth Steimel and Sandra K{\"u}bler},
  booktitle={*SEMEVAL},
  year={2016}
}
We present the IUCL system, based on supervised learning, for the shared task on stance detection. Our official submission, the random forest model, reaches a score of 63.60, and is ranked 6th out of 19 teams. We also use gradient boosting decision trees and SVM and merge all classifiers into an ensemble method. Our analysis shows that random forest is good at retrieving minority classes and gradient boosting majority classes. The strengths of different classifiers wrt. precision and recall… 

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