-md-12 pt-5 text-center">
                <h1 class="display-3 font-weight-light">What is Bootstrap?</h1>
                <h1>and, Why Should I Use It?</h1>
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    <section id="howto">
        <div class="container">
            <div class="row mb-3">
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                    <h3 class="pb-5 text-justify">Bootstrap consists of CSS and JavaScript files. Bootstrap is a fr