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.

Input: Consider Input:  A detailed histopathologic review of 50 primary breast cancer tumors analyzed for estrogen receptor ( ER ) level was carried out and a variety of morphologic features correlated with ER results to identify any factors that will improve the management and prognosis for breast cancer .

Output: estrogen receptor


Input: Consider Input:  Activated STAT3 was shown to bind an SIE - related element in the murine mcl - 1 promoter .

Output: Activated STAT3


Input: Consider Input:  In conclusion , ( 1 ) somatic BCL - 6 mutations are restricted to cHD cases of B - cell origin , and ( 2 ) the BCL - 6 mutations represent mostly irrelevant somatic base substitutions without consequences for BCL - 6 protein expression and the pathogenesis of cHD .


Output: BCL - 6