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_28039032_1 (winners_from_previous_round VARCHAR, round VARCHAR)

### Question ###
How many winners from previous round were there in the semi finals?

### Accurate SQL ###

SELECT winners_from_previous_round FROM table_28039032_1 WHERE round = "Semi finals"