In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

Example Input:  Amniotic fluid ionic concentration in response to chronic fetal vasopressin infusion .
Example Output: fetal vasopressin

Example Input:  A lead phthalocyanin method for the demonstration of acid hydrolases in plant and animal tissues .
Example Output: acid hydrolases

Example Input:  Human CD38 , a leukocyte receptor and ectoenzyme , is a member of a novel eukaryotic gene family of nicotinamide adenine dinucleotide + - converting enzymes : extensive structural homology with the genes for murine bone marrow stromal cell antigen 1 and aplysian ADP - ribosyl cyclase .
Example Output:
Human CD38