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: Design, synthesis and structure-activity relationship of new arginine vasopressin analogues containing proline derivatives in position 2.
Example Output: arginine vasopressin

Example Input: Epithelioid gastrointestinal stromal tumor with PDGFRA activating mutation and immunoreactivity.
Example Output: PDGFRA

Example Input: Comparison of captopril and enalapril to study the role of the sulfhydryl-group in improvement of endothelial dysfunction with ACE inhibitors in high dieted methionine mice.
Example Output:
ACE