Files:
    mturk-box-instructions.png     Instructions for the "draw a box" task (Sec 5.1 of main paper)
    mturk-box-task.mp4             Video of an author using the interface
    mturk-style-instructions.png   Instructions for the user study task (Sec 6.2, "user study")
    mturk-style-task.png           Screenshot of the user study task
