human
Generate for me a description of a risky scene in a town yard with a plank and a stain on the ground.
assistant
A slender plank precariously offers a path to the adjacent rooftop. It would be wise not to drink too much before attempting the task, as it's going to take a great deal of concentration to cross safely. There is a very large, very visible stain of some sort on the alley floor directly beneath the plank.