Complex sentence: Of the 21 players in the squad, 14 were Basques, among them Pichichi, José María Belauste, Domingo Acedo and Félix Sesúmaga.
Split into simpler sentences: Of the 21 players in the squad, 14 were Basques. Among them were Pichichi, José María Belauste, Domingo Acedo and Félix Sesúmaga.