What were the scores by the individual judges for Karanvir Bohra on August 13?
create table table_18278508_6 (scores_by_each_individual_judge varchar, main_contestant varchar, date_performed varchar, PRIMARY KEY (scores_by_each_individual_judge))
select scores_by_each_individual_judge from table_18278508_6 where main_contestant = "karanvir bohra" and date_performed = "august 13"