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| <books> |
| <book> |
| <author>Mark Twain</author> |
| <title>The Adventures of Tom Sawyer</title> |
| <category>FICTION</category> |
| <year>1876</year> |
| </book> |
| <book> |
| <authors> |
| <author>Niklaus Wirth</author> |
| <author>Somebody else</author> |
| </authors> |
| <title binding="paperback">The Programming Language Pascal</title> |
| <category >PASCAL</category> |
| <year>1971</year> |
| </book> |
| <book> |
| <author>O.-J. Dahl</author> |
| <title binding="hardcover" subcategory="non-fiction">Structured Programming</title> |
| <category>PROGRAMMING</category> |
| <year>1972</year> |
| </book> |
| </books> |
