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<h4>Science, Tech, Math</h4> <table> <thead> <tr> <th>category</th> <th>id</th> </tr> </thead> <tbody> <tr> <td>Science</td> <td>science-4132464</td> </tr> <tr> <td>Math</td> <td>math-4133545</td> </tr> <tr> <td>Social Sciences</td> <td>social-sciences-4133522</td> </tr> <tr> <td>Computer Science</td> <td>computer-science-4133486</td> </tr> <tr> <td>Animals &amp; Nature</td> <td>animals-and-nature-4133421</td> </tr> </tbody> </table> <h4>Humanities</h4> <table> <thead> <tr> <th>category</th> ...