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:  Cellularity and fibrosis were unrelated to the presence or absence of oestrogen receptor .
Example Output: oestrogen receptor

Example Input:  High constitutive expression of the IFNgamma - inducible genes , IFN - stimulated gene factor 3 gamma subunit ( ISGF3gamma ) , IFN regulatory factor - 1 ( IRF - 1 ) , and the cyclin - dependent kinase inhibitor p21 ( WAF1 ) was found in FANCC mutant B lymphoblasts , low - density bone marrow cells , and murine embryonic fibroblasts .
Example Output: IRF - 1

Example Input:  Activation of the Lck tyrosine protein kinase by the Herpesvirus saimiri tip protein involves two binding interactions .
Example Output:
tip protein