如下面一段文本:
Alice Emma has long flowing red hair. Her Daddy says when the wind blows through her hair, it looks almost alive, like a fiery bird in flight. A beautiful fiery bird, he tells her, magical but untamed. "Daddy, shush, there is no such thing, "she tells him, at the same time wanting him to tell her more. Shyly, she asks, "I mean, Daddy, is there?"
实现将其拆分为一个一个的单词,保存其在文中的行号及在行中的位置,并且剔除文中的标点:
vector<string> *retrieve_text()......
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