在给定的文本中找到所有单词“cat”的实例并输出它们所在的句子。
原始文本：The cat in the hat sat on the mat. The fat cat sat on the mat. The black cat ran away.
句子1：The cat in the hat sat on the mat.

句子2：The fat cat sat on the mat.

句子3：The black cat ran away.