In this task, you will be given sentences in which you have to recognize the name of the body cells. A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Although there might be several correct answers, you need to write one of them.

Example Input:  In vitro cytotoxic potential and mechanism of action of selected coumarins , using human renal cell lines .
Example Output: cell lines

Example Input:  The total lymph node cell numbers ( A ) and IL - 4 ( B ) , IFN - gamma ( C ) and IL - 10 ( D ) secreted from the PLN cells after ex vivo stimulation with Con A were determined .
Example Output: PLN cells

Example Input:  Chronic rubella viremia has been detected in peripheral blood mononuclear cell ( MNC ) populations in five of the six women up to six years after vaccination .
Example Output:
MNC