+(defvar gnus-agent-short-article 500
+ "Articles that have fewer lines than this are short.")
+
+(defvar gnus-agent-long-article 1000
+ "Articles that have more lines than this are long.")
+
+(defvar gnus-agent-low-score 0
+ "Articles that have a score lower than this have a low score.")
+
+(defvar gnus-agent-high-score 0
+ "Articles that have a score higher than this have a high score.")
+