diff --git a/ocaml/evaluate.ml b/ocaml/evaluate.ml
new file mode 100644
index 0000000..e4e8046
--- /dev/null
+++ b/ocaml/evaluate.ml
@@ -0,0 +1,20 @@
+open Str
+
+
+let is_url url =
+  let regexp = regexp "\\(https?\\://\\)?www\\..+\\..+" in
+  string_match regexp url 0
+
+
+let is_youtube_url url =
+  let regexp = regexp "\\(https?\\://\\)?\\(www\\.\\)?\\(youtube\\.com\\)\\|\\(youtu\\.be\\)/.+" in
+  string_match regexp url 0
+
+
+(* Maybe have a list of functions and
+ * iter on all the items in the list *)
+let evaluate str =
+  match str with
+  | str when is_url str ->
+      SimpleHttp.get_http_title (SimpleHttp.get_body str)
+  | _ -> None
diff --git a/ocaml/shell.ml b/ocaml/shell.ml
index 31dd7d3..076c242 100644
--- a/ocaml/shell.ml
+++ b/ocaml/shell.ml
@@ -1,38 +1,14 @@
 open Str
 
 
-let is_url url =
-  let regexp = regexp "\\(https?\\://\\)?www\\..+\\..+" in
-  string_match regexp url 0
-
-
-let is_youtube_url url =
-  let regexp = regexp "\\(https?\\://\\)?\\(www\\.\\)?\\(youtube\\.com\\)\\|\\(youtu\\.be\\)/.+" in
-  string_match regexp url 0
-
-
-(* Maybe have a list of functions and
- * iter on all the items in the list *)
-let evaluate str =
-  match str with
-  | str when is_youtube_url str ->
-      (
-        let title = SimpleHttp.get_http_title (SimpleHttp.get_body str) in
-        match title with
-        | Some s -> s
-        | None -> ""
-      )
-  | str when is_url str -> str
-  | _ -> ""
-
-
 let () =
   try
     while true do
       print_string "> ";
       let line = read_line () in
-      let answer = evaluate line in
-      print_endline answer
+      match Evaluate.evaluate line with
+      | Some answer -> print_endline answer
+      | _ -> ()
     done
   with
     End_of_file -> print_endline "Bye!";;