Based on our linguistic analysis, we formalize a set of temporal elements that are the blocks used to construct time entities, such as century, year, month, day, hour etc.
tempEval-2 corpus includes training and test parts, as shown in table 2 We analyse the annotation scheme based on training data and then add some additional rules on durations, such as shinian (ten years), shi-tian (ten days), and some approximate expressions, e.g.