CREATE TABLE table_name_2 (class VARCHAR2, rank VARCHAR2, entrant VARCHAR2, points VARCHAR2, chassis VARCHAR2)

What was the class when adt champion racing ranked 1st with an audi r8 chassis, and less than 206 points?
SELECT class FROM table_name_2 WHERE points < 206 AND chassis = "audi r8" AND entrant = "adt champion racing" AND rank = "1st"
SELECT "class" FROM "table_name_2" WHERE "1st" = "rank" AND "adt champion racing" = "entrant" AND "audi r8" = "chassis" AND "points" < 206