diff --git a/README.md b/README.md
index 50dd643..1954477 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 # ZOL Parser
 
-ZOL stands for zeroth order logic, so this program can parse zeroth order logic.
\ No newline at end of file
+ZOL stands for zeroth order logic, so this program can parse zeroth order logic.
+
+![Example Usage](img/example.png)
\ No newline at end of file
diff --git a/ZOLparser/Expression.hpp b/ZOLparser/Expression.hpp
index acafd1f..aecee54 100644
--- a/ZOLparser/Expression.hpp
+++ b/ZOLparser/Expression.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <string>
+
 class Expression
 {
 public:
diff --git a/img/example.png b/img/example.png
new file mode 100644
index 0000000..2807836
Binary files /dev/null and b/img/example.png differ