Performance of named entity recognition using SVM learn-to-rank (SVM+LTR) for all entities in the cross-validation test and unique entities only.

<p>Each horizontal row shows Precision, Recall and F-score performance for a class using alternative methods. <i>Unique Rate</i> shows the percentage of unique entity mentions seen in the cross-validation test for each class. <i>ALL</i> shows micro-averaged F-score.