<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE books SYSTEM "books.dtd">
<books>
    <book>
    <title>The Grapes of Wrath</title>
    <author>John Steinbeck</author>
    <author>John Steinbeck</author>
    </book>
    <book>
    <title>The Pearl</title>
    <author>John Steinbeck</author>
    </book>
</books>
