Initiated by a recent FASEB J article, and thanks to Bora and Bob, I would like to recommend the following paper:

Bunnett, JF and Kearley FJ. Comparative mobility of halogens in reactions of dihalobenzenes with potassium amide in ammonia. J Org Chem 1971;36: 184-6.

Here are the last three sentences from the discussion:

Attack on the haloanilines that form.
An unexpected pathway of reaction,
Unclear in its details, is thus revealed.
This complication, our thanks to him,
Is under study by Jhong Kook Kim.

Heather has started a discussion about the FASEB J article and the merits of poetry elsewhere in this forum.