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.

Ex Input:
Clinical assessment of norepinephrine transporter blockade through biochemical and pharmacological profiles.

Ex Output:
norepinephrine transporter

Ex Input:
Neonatal epileptic encephalopathy caused by mutations in the PNPO gene encoding pyridox(am)ine 5'-phosphate oxidase.

Ex Output:
PNPO

Ex Input:
Differential gene expression in ER-positive and ER-negative breast cancer cells upon leptin stimulation.

Ex Output:
leptin