Lincoln-Sudbury Regional High School will host a Deana’s Educational Theater production of “The Yellow Dress’’ at 7 p.m. Thursday to help the school community better understand and deal with problems surrounding dating violence. The public performance is a culmination of a yearlong initiative, led by the Lincoln-Sudbury Mentors in Violence Prevention team. This year, the team has focused on responding to recent examples of abusive relationships, including the murder of Lauren Astley, a 2011 graduate of Wayland High School. “The Yellow Dress’’ is a one-woman play that tells the story of someone involved in a relationship that begins as young love, full of passion and promise, and ends in tragedy. After the performance, Mary Dunne, Lauren Astley’s mother, will briefly speak to the audience.