TASK DEFINITION: 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.
PROBLEM:  Archived serum collected near the time of the accident was used to measure exposures .

SOLUTION: serum

PROBLEM:  However , if the underlying disease is acute lymphoma leukemia ( ALL ) , malignant lymphoma ( ML ) , or acute myelogenous leukemia ( AML ) , the definition of infection is defined as the ability to detect infectious organisms by blood culture analysis .

SOLUTION: blood

PROBLEM:  Our data suggest that yolk - DNA arises by the adventitious uptake of DNA present in the maternal serum by vitellogenic oocytes .

SOLUTION:
serum