<qa>  What is the name of the drug resistant epilepsy that is defined as?- Documentation of a diagnosis of drug resistant epilepsy as evidenced by failure to control seizures despite appropriate trial of two or more AEDs at therapeutic doses. Drug resistant epilepsy for this study is defined as: At least 1 reported quantifiable no cluster or innumerable defined seizure with motor signs per month for at least 3 months prior to initial visit and during the period between Visit 1 Screening Visit and Visit 2 Baseline Visit, as per data captured in daily seizure diaries. These can be focal seizures, focal seizures with impaired consciousness, myoclonic seizures, generalized, and secondarily generalized seizures. 