Details of recognizing chronological information

1. A rulebased parser to isolate all numerical phrases.

2. Then a recognizer: either a
   1. Rule-based or a
   2. Machine learning system

3. a module to create the index to facilitate retrieval

4. a module to score the chronological phrase in the page

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Please observe the red text that should be recognized as chronological references relevant to the query (blue: not relevant).