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_27484208_1 (world_rank_by_arwu_ VARCHAR, _2013 VARCHAR, members VARCHAR)

### Question ###
What was the world rank by ARWU in 2013 of the University of Tübingen?

### Accurate SQL ###

SELECT world_rank_by_arwu_, _2013 FROM table_27484208_1 WHERE members = "University of Tübingen"