 Complete the following phrase:  Since the rule was re-introduced, only twice have cars failed to qualify for a Grand Prixboth times involving Hispania Racing cars and both times occurring at the Australian Grand Prix, namely in 2011 Vitantonio Liuzzi and Narain Karthikeyan and 2012 Karthikeyan and Pedro de la Rosa. On other occasions, however, drivers who had not set a time within the desired 107 span during qualifying have been permitted to race by the stewards on grounds of corresponding lap times in free practice. For example, in the 