Sibghat Ullah PhD candidate/ guest Name Dr. S. Ullah Telephone +31 71 527 4799 E-mail s.ullah@liacs.leidenuniv.nl PhD candidate/ guest Science Leiden Inst of Advanced Computer Science Work address Gorlaeus Building Einsteinweg 55 2333 CC Leiden Contact +31 71 527 4799 s.ullah@liacs.leidenuniv.nl Publications No relevant ancillary activities