In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.
Q:  In this study , the authors found that the primary LE of the lung is associated with young age , a history of not smoking , high bcl - 2 immunoreactivity , and better survival rate .
A: 
lung