Detailed Instructions: 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.
See one example below:
Problem: I have serious allergy in my left eye.
Solution: eye
Explanation: Eye is an organ which has been affected, hence should be tagged.

Problem:  Image - directed and color Doppler studies of gallbladder tumors .
Solution:
gallbladder