Show the number of claimed papers

paper_list.py

@@ -63,7 +63,7 @@ class PaperList:
         self.table['html_table_content'] = rows
 
     def render(self, search_query: str, case_sensitive: bool,
-               filter_names: list[str]) -> tuple[int, str]:
+               filter_names: list[str]) -> tuple[str, str]:
         df = self.table
         if search_query:
             if case_sensitive:
@@ -77,7 +77,9 @@ class PaperList:
         has_hf_dataset = 'Dataset' in filter_names
         df = self.filter_table(df, has_arxiv, has_github, has_hf_space,
                                has_hf_model, has_hf_dataset)
-        return len(df), self.to_html(df, self.table_header)
+        n_claimed = len(df[df.n_linked_authors > 0])
+        return f'{len(df)} ({n_claimed} claimed)', self.to_html(
+            df, self.table_header)
 
     @staticmethod
     def filter_table(df: pd.DataFrame, has_arxiv: bool, has_github: bool,