diff --git a/.gitignore b/.gitignore
index d6cd31930..c08007d05 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,6 @@ lectures/_build/
 .ipynb_checkpoints/
 .virtual_documents/
 node_modules/
-package-lock.json
\ No newline at end of file
+package-lock.json
+# regenerated by finite_markov.md via %%file; never commit it
+lectures/web_graph_data.txt
diff --git a/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt b/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt
deleted file mode 100644
index d8f52cb79..000000000
--- a/lectures/_static/lecture_specific/finite_markov/web_graph_data.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-a -> d;
-a -> f;
-b -> j;
-b -> k;
-b -> m;
-c -> c;
-c -> g;
-c -> j;
-c -> m;
-d -> f;
-d -> h;
-d -> k;
-e -> d;
-e -> h;
-e -> l;
-f -> a;
-f -> b;
-f -> j;
-f -> l;
-g -> b;
-g -> j;
-h -> d;
-h -> g;
-h -> l;
-h -> m;
-i -> g;
-i -> h;
-i -> n;
-j -> e;
-j -> i;
-j -> k;
-k -> n;
-l -> m;
-m -> g;
-n -> c;
-n -> j;
-n -> m;
diff --git a/lectures/web_graph_data.txt b/lectures/web_graph_data.txt
deleted file mode 100644
index d8f52cb79..000000000
--- a/lectures/web_graph_data.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-a -> d;
-a -> f;
-b -> j;
-b -> k;
-b -> m;
-c -> c;
-c -> g;
-c -> j;
-c -> m;
-d -> f;
-d -> h;
-d -> k;
-e -> d;
-e -> h;
-e -> l;
-f -> a;
-f -> b;
-f -> j;
-f -> l;
-g -> b;
-g -> j;
-h -> d;
-h -> g;
-h -> l;
-h -> m;
-i -> g;
-i -> h;
-i -> n;
-j -> e;
-j -> i;
-j -> k;
-k -> n;
-l -> m;
-m -> g;
-n -> c;
-n -> j;
-n -> m;