I am trying to use MC1268, which detects if an item is in an above chest, with a Book and Quill that has text in it. I want to detect if the book in the chest has a certain text on its first page. According to the documentation, MC1268 supports detecting item data, and when looking at the item syntax page, books can apparently have data. But when I try it, it doesn't work. I used a sign with: [MC1268]S 386/page:test But when I put a blank Book and Quill in the chest, the output was triggered, even though the book was blank.