CREATE TABLE table_29538 ("Members" TEXT, "Country" TEXT, "Year Established" FLOAT, "World Rank by THE-WUR  ,  2013" TEXT, "World Rank by ARWU  ,  2013" TEXT, "World Rank by QS  ,  2013" TEXT)

What was the world rank by ARWU in 2013 of the University of T bingen?
SELECT "World Rank by ARWU , 2013" FROM table_29538 WHERE "Members" = 'University of Tübingen'
SELECT "World Rank by ARWU , 2013" FROM "table_29538" WHERE "Members" = 'University of Tübingen'