GREGORIO PALACOL, PEDRO D. PALACOL, and ELEANOR D. PALACOL, Petitioners, v. HON. COURT OF APPEALS, BRUNO BUMANGLAG, RUFO DOMINGO, FAUSTINO NOVENO, SAMUEL FERIA, MAXIMO OLIGO, VICENTE MERCADO, ESTANISLAO ESTABILLO, RUFO FABIANES, JUAN VALENZUELA, VICTOR NATIVIDAD, and HILARIO VALENZUELA, Respondents