Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_28241890_2 (next_in_line VARCHAR, heir VARCHAR)

### Question ###
How many next in lines had heirs of Archduke Karl?

### Accurate SQL ###

SELECT COUNT(next_in_line) FROM table_28241890_2 WHERE heir = "Archduke Karl"