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.
One example: I have serious allergy in my left eye.
Solution is here: eye
Explanation: Eye is an organ which has been affected, hence should be tagged.

Now, solve this: Portal venous blood draining into the liver from the intra - abdominal abscess had increased levels of TNF - alpha , IL - 1beta , and IL - 6 in both sterile and septic groups compared with a control normal animal group .
Solution:
liver