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]:  Liver histology demonstrated sinusoidal congestion centering on the central vein , growing worse with progression from normal in control , to sterile , to septic .
[EX A]: Liver

[EX Q]:  In this report we assess the systolic maximal flow velocity in carotid and intracranial arteries in 191 subjects with no history of cerebral vascular disease in 3 age groups : 20 - 40 years ( 1 group ) , 41 - 60 years ( 2 group ) , and above 60 years ( 3 group ) .
[EX A]: cerebral

[EX Q]:  This case of benign mucous membrane pemphigoid ( BMMP ) is unusual in that blistering , scarring lesions were confined to the skin for 15 years before mucous membranes were involved .
[EX A]:
skin