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_name_51 ( lijsttrekker VARCHAR, year VARCHAR, chair VARCHAR )

### Question ###
What is Lijsttrekker, when Year is after 1990, and when Chair is 'Ingrid Van Engelshoven'?

### Accurate SQL ###

SELECT lijsttrekker FROM table_name_51 WHERE year > 1990 AND chair = "ingrid van engelshoven"