统计一篇文章中每个单词出现的次数，并返回一个包含单词和出现次数的字典。


以下是一篇文章：“The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog again.”
{"The": 2, "quick": 2, "brown": 2, "fox": 2, "jumps": 2, "over": 2, "the": 2, "lazy": 2, "dog": 2, "again": 1}