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.

[EX Q]:  The endotracheal tube also enhances bacterial entry to the lung by serving as a reservoir for bacteria to remain sequestered , safe from host defenses .
[EX A]: lung

[EX Q]:  In a second experiment , we use brain MRI scans of 282 subjects to demonstrate that the proposed segmentation tool is sufficiently sensitive to robustly detect hippocampal volume changes in a study of aging and Alzheimer ' s Disease .
[EX A]: brain

[EX Q]:  The IOP readings with GAT , PT , and ST were compared in 125 eyes with normal corneas ( Group A ) , 17 eyes with scarred corneas ( Group B ) , and in 21 postkeratoplasty eyes ( Group C ) .
[EX A]:
eyes