ba bla bla</p><h2>Chapter 2</h2><p>This chapter explains ba bla bla</p><h2>Chapter 3</h2><p>This chapterexplains ba bla bla</p><h2><a name='C4'>Chapter 4</a></h2&
让我们假设一个字符串样本的形式是: "Some string that explains y. Additional information.Precaution",
"Some string that explains z. Justification.explains y.[2] "Some string that