Give sed and grep example in drop-down box

docs/1.Simple_example.md

@@ -46,6 +46,23 @@ gold     1    1988  Canada              Maple Leaf
 
 This mimics the use of **grep** or **sed**, so why would one possibly need awk?
 
+??? question "How does this mimic **grep** or **sed**?"
+
+    In `grep`, the command that does exactly the same is:
+
+    ```
+    grep silver coins.txt
+    ```
+
+    In `sed`, the command that does exactly the same is:
+
+    ```
+    sed -n "/silver/p" coins.txt
+    ```
+
+    `awk` starts to shine when the thing you want to do is more
+    complex then detecting lines with a text.
+
 **Now, suppose we want to list all the coins that were minted before 1980**. We invoke Awk as follows:
 
 ``` awk hl_lines="1"