This appeared in the queue "because of length and content". Why? It wasn't a super-short post by a newish user. What about it distingishes it from any other post? Are there keywords? Otherwise, I have to think it was flagged manually somehow.
Yes, this was flagged manually as Not an Answer, and entered the moderator flag queue and the Low Quality Posts queue. The community dealt with it before a diamond moderator did, and, for the record, it was automatically marked as "disputed" after going through the review queue.