Complex sentence: Offshore, the vessel "Datu Kalantiaw" was wrecked by a coral reef off Calayan Island, with 19 of the 97 people people rescued by Clark Air Base while 52 bodies were recovered and the remaining others were presumed dead.
Split into simpler sentences: Offshore, the vessel "Datu Kalantiaw" was wrecked by a coral reef off Calayan Island, with 19 of the 97 people necessitating rescue. A total of 52 bodies from the shipwreck were recovered and the remaining others were presumed dead.