Numeric. If set to a non-zero value, the resulting data.frame will be sorted
alphabetically
according to the drama and character name. If the value is above 0, the
sorting will be ascending, if set to a negative value, the sorting is
descending. If sort is set to 0 (the default), the order is unchanged.
The ordering can also be specified explicitly, by passing an integer vector
with as many elements as x
has rows.