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<html lang="en" xmlns:th="http://www.thymeleaf.org">


<table th:fragment="mainMenu">
    <tr>
        <td> Authors name </td>
        <td>&nbsp; Authors id  </td>
    </tr>

    <tr th:each="author : ${categories}">
        <td>
            <p th:text="${author}"></p>
        </td>

        <td>
            <p th:text="${author}"></p>
        </td>
    </tr>
</table>