From the article. >we used keyword-based classification to assess whether they contained support for politicians, movements, parties, or ideologies They don't

From the article. >we used keyword-based classification to assess whether they contained support for politicians, movements, parties, or ideologies They don't need AI to improve this. A boring old keyword search would improve things. Sure, classifying groups perfectly is a difficult problem especially at Facebook's scale. But this shows almost a complete lack of effort when groups like "Bernie Sanders for President 2020" and "Liberty lovers for Ted Cruz" are recommended.