Computer Science Essay about AI

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.