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:
The atypical antidepressant mianserin exhibits agonist activity at kappa-opioid receptors.

Ex Output:
kappa-opioid


Ex Input:
Synthesis of novel estrogen receptor antagonists using metal-catalyzed coupling reactions and characterization of their biological activity.

Ex Output:
estrogen receptor


Ex Input:
Mediation of noradrenaline-induced contractions of rat aorta by the alpha 1B-adrenoceptor subtype.

Ex Output:

alpha 1B-adrenoceptor