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<form action="example.com/path" method="post">

</form>

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<form action="example.com/path" method="post">
  <input type="text">
</form>

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<form action="example.com/path" method="post">
  <label for="firstName">First Name:</label>
  <input type="text" id="firstName">
</form>

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<label for="first_name">First Name:</label>
<input type="text" id="first_name" placeholder="Bob...">

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<label for="first_name">First Name:</label>
<input type="text" id="first_name" name="first_name">