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:  Human T cell leukemia virus type 1 ( HTLV - 1 ) Tax protein transforms primary human T cells in vitro .
Example Output: Tax protein

Example Input:  We conclude that peritoneal fluid of endometriosis patients contains activators of PPAR - alpha that stimulate macrophage chemotaxis .
Example Output: PPAR - alpha

Example Input:  Here , we describe a novel function of IL - 6 : the negative regulation of CD4 + Th1 cell differentiation .
Example Output:
IL - 6