Task: Question Understanding
Input (English): Context : A pillar from Mathura referring to Chandragupta II has recently been dated to 388 CE. Chandragupta II's daughter, Prabhavatigupta, by his Naga queen Kuberanaga was married to the powerful Vakataka dynasty ruler Rudrasena II (r.380-385 CE). 
Question : What is Chandragupta II's spouse's name?
Output (English): spouse