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:  Troglitazone , a PPARgamma ligand , dramatically attenuated the PMA - induced osteopontin expression .
Example Output: PPARgamma ligand

Example Input:  Ultrastructural studies demonstrated sequential changes in the cytoplasm , including swelling of mitochondria and cytoplasmic decompartmentalizati , followed by loss of surface microvilli with the appearance of ` ` holes ' ' in the cell membrane , and subsequent condensation of nuclear chromatin .
Example Output: nuclear chromatin

Example Input:  The steroid receptor content does not correlate with histological parameters
Example Output:
steroid receptor