def mid_point(bboxes):
    """
    Method to find the bottom center of every bbox

    Input:
        bboxes: all the boxes containing "person"

    Returns:
        Return a list of bottom center of every bbox
    """

    mid_values = list()
    for i in range(len(bboxes)):
        #get the coordinates
        coor = bboxes[i]
        (x1, y1), (x2, y2) = (coor[0], coor[1]), (coor[2], coor[3])
        
        #compute bottom center of bbox
        x_mid = int(x1 - ((x1 - (x1 + x2)) / 2))
        y_mid = int(y1 + y2)

        mid_values.append((x_mid, y_mid))
        
    return mid_values