def get_center_point(box_coordinates):
    """
    Returns the center point coordinate of a rectangle.

    Args:
        box_coordinates (list): A list of four (int) coordinates,
                                representing a rectangle "box".
    Returns:
        list: A list with two (int) coordinates, the center point
              of the coordinate, i.e.: the intersection between
              the rectangle's diagonals.
    """
    x1, y1, x2, y2 = box_coordinates
    return [int((x1 + x2) / 2), int((y1 + y2) / 2)]