Facts:
The object of the dispute in this case is a parcel of land originally owned by Adriano Soriano who died intestate in 1947.
Heirs of Adriano Soriano leased the property to spouses David de Vera and Consuelo Villasista on June 30, 1967, for a period of fifteen (15) years beginning July 1, 1967.
On the contract of lease, paragraph 5, provided that Roman Soriano, one of the children of the late Adriano, will be the caretaker of the property during the period of the lease.
During the effectivity of the lease contract, the heirs of Adriano Soriano entered into an extrajudicial settlement of his estate. On January 11, 1968, the property was divided into two (2) lots, Lot No. 60052 and Lot No. 8459.
The Lot No. 60052 (Lot 1) was assigned to Lourdes, Candido and the heirs of Dionisia while the Lot No. 8459 (Lot 2) was assigned to Francisco, Librada, Elcocadio and Roman.
The new owners of Lot No. 60052 sold the portions assigned to them to spouses Braulio and Aquilina Abalos. As well as, the new owners of Lot 8459, except Roman, sold their shares to the Abalos spouses.
On March 14, 1968, the de Vera spouses ousted Roman as caretaker and appointed Isidro Versoza and Vidal Versoza as his substitutes. Thereafter, Roman filed a case for reinstatement and reliquidation against the de Vera spouses.
On September 30, 1969, the Agrarian Court rendered a decision authorizing the ejectment of Roman. On appeal, the decision was reversed by the Court of Appeals. However, before it was executed, the parties entered into a post-decisional agreement wherein the de Vera spouses allowed Roman Soriano to sub-lease the property until the termination of the original lease on June 30 1982. This agreement was approved by the CAR court in an order dated December 22, 1972.
On August 16, 1976, the Abalos spouses filed with the then Court of First Instance of Pangasinan at Lingayen an application for registration of title. The application claimed ownership of