Bo Xu, Yong Xu, Jiaqing Liang, Chenhao Xie, Bin Liang, Wanyun Cui, and Yanghua Xiao. CN-DBpedia: A Never-Ending Chinese Knowledge Extraction System. In International Conference on Industrial, Engineering and Other Applications of Applied Intelligent Systems, pp. 428-438. Springer, Cham, 2017.
| 中文名 | 四知堂 | |
| 出自 | 东汉名士杨震,公元 108 年 | |
| 性质 | 杨姓堂号 | |
| 诗句 | 天知、神知、我知、子知 |
| 标签 | 地点 |
| 标签 | 地理 |
| 标签 | 非地理 |