George Garang , Nairobi spokesman for the Sudan People 's Liberation Army ( SPLA ) , said it was urgently trying to contact SPLA commander Nuour Marial at Mapourdit in the south to free the six .
<response> <person>George Garang</person> , <location>Nairobi</location> spokesman for the <organization>Sudan People 's Liberation Army</organization> ( <organization>SPLA</organization> ) , said it was urgently trying to contact <organization>SPLA</organization> commander <person>Nuour Marial</person> at <location>Mapourdit</location> in the south to free the six . </response>