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:  In particular , Candida species are the 4th most common cause of nosocomial bloodstream infections in the United States , and Cryptococcus neoformans , the commonest cause of fungal meningitis worldwide [ 1 ] , [ 2 ] .

SOLUTION: bloodstream

PROBLEM:  In newborn pigs , sympathetic nerves may attenuate hypertension - induced increases in blood flow to the cerebrum , but do not appear to affect flow to the rest of the brain .

SOLUTION: blood

PROBLEM:  This reaction requires a desalting step which often represents a major obstacle , especially if the sample consists of limited amounts of a hydrophobic membrane protein .

SOLUTION:
sample