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:  We have analyzed the role of the HU protein in invertasome assembly when the enhancer is located at variable positions close to one of the recombination sites .
Example Output: HU protein

Example Input:  gp170 is expressed at a level 30 to 50 % of the Env precursor gp130 .
Example Output: Env precursor

Example Input:  Plasma prolactin concentrations during incubation , 25 . 8 + / - 2 . 3 ng / ml , decreased to baseline levels , 10 . 8 + / - 1 . 9 ng / ml , within 24 hr after nestbox removal .
Example Output:
Plasma prolactin