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<!-- HTML Example -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Sample Page with Headings</title>
</head>
<body>
    <h1>Main Title of the Page</h1>
    <p>Introduction to the page content.</p>

    <h2>First Section Heading</h2>
    <p>Content under the first section.</p>

    <h3>Subsection Heading within First Section</h3>
    <p>Content under the first subsection.</p>

    <h2>Second Section Heading</h2>
    <p>Content under the second section.</p>

    <h3>Subsection Heading within Second Section</h3>
    <p>Content under the second subsection.</p>
</body>
</html>