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.