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:
Characterization of the nitrosyl adduct of substrate-bound mouse cysteine dioxygenase by electron paramagnetic resonance: electronic structure of the active site and mechanistic implications.

Ex Output:
mouse cysteine dioxygenase


Ex Input:
Hexahydrochromeno[4,3-b]pyrrole derivatives as acetylcholinesterase inhibitors.

Ex Output:
acetylcholinesterase


Ex Input:
Captopril directly inhibits matrix metalloproteinase-2 activity in continuous ambulatory peritoneal dialysis therapy.

Ex Output:

matrix metalloproteinase-2