... Before Timestamp 95 Same as Timestamp 73 After Timestamp 84 Overall Accuracy Fine-Grained Accuracy R 98 57 81 With Year Mentions 46.1% 54.3% 57.7% Table 6: Accuracy on all documents and documents with ... that naturally fits into our classifier Timestamp Classifiers Labeling documents with timestamps is similar to topic classification, but instead of choosing from topics, we choose the most likely ... creation This section builds a classifier to label time mentions with their relations (e.g., before, after, or simultaneous with the document’s timestamp), enabling these mentions to constrain...