Fix `Document.is_relevant()`

ahisto_named_entity_search/document/document.py

@@ -321,7 +321,7 @@ class Document:
     def is_relevant(self) -> bool:
         is_relevant = (
             self.book_id in self.__class__.RELEVANT_PAGES and
-            self.page_id not in self.__class__.RELEVANT_PAGES[self.book_id]
+            self.page_id in self.__class__.RELEVANT_PAGES[self.book_id]
         )
         return is_relevant