Detailed Instructions: In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.
See one example below:
Problem: Antisperm antibodies were assessed in the serum samples of 73 men unable to ejaculate naturally and on the sperm cells of 13 of these men.
Solution: serum
Explanation: Serum is a substance of the organism and needs to be tagged.

Problem:  Although TCDD was largely below the detection limits in this small pilot sample , the two boys with detectable values had high TCDD levels ( 17 . 9 and 21 . 7 pg / g lipid ) , suggesting that exposure for at least some portion of this population is substantially higher than typical of this age group .
Solution:
sample