1. Please read and summarize a research paper(just section 2)
2. Single space and single column.
3. 3- 4pages.
4. Need at least 2 outside source
5. The link of article https://ojs.aaai.org//index.php/AAAI/article/view/6730
Section 2 (Previous work): When this problem was first studied? What kind of results are currently available regarding this problem? Give some background here.