CONRADO NUÑEZ, JR., CLARITA NUÑEZ-ABRAHAM, CELIA NUÑEZ-NUÑEZ, HEIRS OF EDUVEGES NUÑEZ-ALINEA, AS REPRESENTED BY CONRADO NUÑEZ, JR., AND HEIRS OF HELEN NUÑEZ QUIOZON, REPRESENTED BY ROBERT CONRAD NUÑEZ QUIOZON AND CONRADO NUÑEZ, JR., PETITIONERS, VS. SPOUSES OSCAR AND NORMA NUNEZ, THE CITY ASSESSOR OF QUEZON CITY, AND THE REGISTER OF DEEDS OF QUEZON CITY, RESPONDENTS