// author: Hui Li
// email:  hui.li@informatik.uni-heidelberg.de
// date:   2013-12-12
// This file contains regular expression patterns for year numbers (4 digits).
// FORMAT: one line is one disjunction of the pattern
[12]\d\d\d
[一二１２][零一二三四五六七八九０１２３４５６７８９]{3}
