Philippine bar exam questions 2008 (Civil Q1)

Ana Rivera had a husband, a Filipino citizen like her, who was among the passengers on board a commercial jet plane which crashed in the Atlantic Ocean ten(10) years earlier and had never been heard of ever since. Believing that her husband had died, Ana married Adolf Cruz Staedtler, a divorced German national born of a German father and a Filipino mother residing in Stuttgart. To avoid being required to submit the required certificate of capacity to marry from the German Embassy in Manila, Adolf stated in the application for marriage license that he was a Filipino citizen. With the marriage license stating that Adolf was a Filipino, the couple got married in a ceremony officiated by the Parish Priest of Calamba, Laguna in a beach in Nasugbu, Batangas, as the local parish priest refused to solemnize marriages except in his church. Is the marriage valid? Explain fully. (5%)