Complex sentence: In this competition, López debuted by defeating local pugilist Antonio Nuñez by points (23:16), but lost a decision to Abner Mares of Mexico, with scores of 23:19.
Split into simpler sentences: In this competition, López debuted by defeating local pugilist, Antonio Nuñez, by points (23:16). But lost a decision to Abner Mares of Mexico, with scores of 23:19.