从给定的一组句子中，找到包含指定单词的句子，并按与指定单词匹配的百分比进行排序。 
句子1: I love to walk in the park. 
句子2: She is reading a book in the library. 
句子3: The cat is sleeping on the sofa. 
指定单词: park
包含指定单词的句子及其匹配的百分比排序：
1. I love to walk in the park. (100%)
2. She is reading a book in the library. (0%)
3. The cat is sleeping on the sofa. (0%)