1. The feed includes stories with no more 52 characters (including spaces)
  2. The feed includes News, NIB, Sports News, Sports NIB
  3. The feed excludes NSFW content

https://www.theonion.com/rss/multi?feedType=p4rtn3rs&storyTypes=news&storyTypes=news-in-brief&storyTypes=sports-news-in-brief&maxHeadlineLength=52