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:  As much thrombin was formed during cardiopulmonary bypass ( measured by the prothrombin activation fragment F1 + 2 and thrombin - antithrombin complexes ) as in normal patients , showing that factor XII was not necessary for thrombin generation .
Example Output: factor XII

Example Input:  Characterization and targeted disruption of murine Nup50 , a p27 ( Kip1 ) - interacting component of the nuclear pore complex .
Example Output: murine Nup50

Example Input:  Of 3841 serum samples from sows received from the Tennessee State Diagnostic Laboratory in 1991 - 1992 , 1130 were positive for Toxoplasma gondii antibody .
Example Output:
Toxoplasma gondii antibody