The conversation between human and AI assistant.
[|Human|] Two of the following words do not belong in the same category. Identify them.
[|AI|] Saber and Spear belong to the same category as they are both edged weapons used in combat. Shotgun, however, is a firearm and does not belong in this category. Thus, the two words that do not belong in the same category are Saber and Shotgun.
[|Human|] 
Two of the following words do not belong in the same category. Identify them.