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: Mifepristone alters expression of endometrial steroid receptors and their cofactors in new users of medroxyprogesterone acetate.
Example Output: steroid receptors

Example Input: COX-1 and COX-2 inhibition in horse blood by phenylbutazone, flunixin, carprofen and meloxicam: an in vitro analysis.
Example Output: COX-2

Example Input: Inhibition of testicular LDH-X from laboratory animals and man by gossypol and its isomers.
Example Output:
LDH-X