<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Create an HTML form that takes one input field - an email address.
<|im_end|>
<|im_start|>assistant
<form action="action.php" method="post">
  <label for="email">Email:</label><br>
  <input type="text" name="email" placeholder="Enter your email"><br><br>
  <input type="submit" value="Submit">
</form><|im_end|>
