Active Learning for Mention Detection: A Comparison of Sentence Selection Strategies

We propose and compare various sentence selection strategies for active learning for the task of detecting mentions of entities. The best strategy employs the sum of con dences of two statistical classi ers trained on di erent views of the data. Our experimental results show that, compared to the random selection strategy, this strategy reduces the amount of required labeled training data by over 50% while achieving the same performance. The e ect is even more signi cant when only named mentions are considered: the system achieves the same performance by using only 42% of the training data required by the random selection strategy.