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:  The hyperpigmentation is linked to the presence of numerous single melanosomes and polymelanosomes in keratinocytes at all levels of the epidermis , and in dermal Factor XIIIa - positive dendrocytes .
Example Output: Factor XIIIa

Example Input:  Tumor necrosis factor levels were measured by enzyme - linked immunoabsorbent assay in plasma samples obtained from the hyperthermic isolated limb perfusion circuit and systemic circulation .
Example Output: Tumor necrosis factor

Example Input:  Also , anti - HIV gp120 and anti - CD4 crosslinking induced a 10 - 15 - fold increase in levels of both PI 3 - and PI 4 - kinase activity in anti - CD4 precipitates .
Example Output:
anti - CD4