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:  We also explored the mechanism of apoptosis by evaluating mitochondrial activity and reactive oxygen species ( ROS ) generation in cells treated with the ion pair .
Example Output: cells

Example Input:  A bio - inert surface chemistry was developed that can confine biofilm formation in designed patterns for at least 26 days .
Example Output: biofilm

Example Input:  ( D ) Confocal images of C - terminally FLAG - tagged MOR1K overexpressed in Be2C cells and stained with either Anti - FLAG M2 Antibody Alexa Fluor Conjugate or fluorescent - labeled naloxone ( FNAL ) .
Example Output:
Be2C cells