diff --git a/.gitignore b/.gitignore
index 129fa150d5dbf80d43bea0c4c240d0d980cf2e8f..00b4114338dbcdc84a43903b573bc3c9dee14670 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 img_cache
 index
-slides
+slides/*.pdf
 .idea
 __pycache__
diff --git a/benchmark_data/bidm/slides/01_Einfuhrung.pdf b/benchmark_data/bidm/slides/01_Einfuhrung.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..a283977f8b4b06e6c6ddb8aa1a5af4cb4a9b7302
Binary files /dev/null and b/benchmark_data/bidm/slides/01_Einfuhrung.pdf differ