Who are the co-authors for Jei Keon Chae and what is the title of paper written by them?
'Jei Keon Chee' is the name of author;
SELECT T2.AuthorId, T1.Title FROM Paper AS T1 INNER JOIN PaperAuthor AS T2 ON T1.Id = T2.PaperId WHERE T2.Name = 'Jei Keon Chae'