41/55 41/23 Impact of Statistical Re-Ranking Pipelines PrecisionRecall F-measure Bottom-upSupervised IE 0.24160.14210.1789 Pattern Matching 0.21860.37690.2767 Top-downQA 0.26680.17300.2099 Priority based Combination 0.30480.26580.2840 Re-Ranking based Combination 0.27970.44330.3430 5-fold cross-validation on training set Mitigate the impact of errors produced by scoring based on co-occurrence (slot type x sys feature) e.g.
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