Original sentence: Historically, almost anything has been proposed, including prayers, a narrative or an adventure story, a "psalterion", a call to arms, a board game, a calendar and a geometric theorem
Edited sentence: Historically, almost anything has been proposed, including prayers, a narrative or an adventure story, a "psalterion", a call to arms, a board game, and a geometric theorem.While many enthusiasts still believe the mystery can be solved, scholarly attempts at decipherment are thought to be unlikely to succeed unless more examples of the glyphs turn up somewhere, as it is generally thought that there isn't enough context available for meaningful analysis