A police identification room seen from behind the one-way glass: a row of men holding number cards against a white wall printed with black height lines under blue-grey fluorescent light, and in the foreground the back or profile of a witness picking one out.

How to prompt: start with policelineup,. Four or five people works best; give each one an ethnicity, a haircut and one distinguishing detail. Spell out the numbers, and add The only text in the picture is the large black position numbers on the wall and the same numbers on the white cards; there is no other text.