Table: lemans_results_3
Columns: year
entrant
class
chassis
engine
tyres
rank
points

Question: What engine what in the vehicle when adt champion racing ranked in 1st place?
SQL: SELECT "engine" FROM lemans_results_3 WHERE "rank" = '1st' AND "entrant" = 'adt champion racing'

Question: What Chassis ranked 18th?
SQL: SELECT "chassis" FROM lemans_results_3 WHERE "rank" = '18th'

Question: What was the class when adt champion racing ranked 1st with an audi r8 chassis, and less than 206 points?
SQL: SELECT "class" FROM lemans_results_3 WHERE "points" < 206 AND "chassis" = 'audi r8' AND "entrant" = 'adt champion racing' AND "rank" = '1st'