Question: Who directed beretta's island starring Franco Columbu?
Sentence (from "Sardinia Kidnapped"): "Kidnapped"), also known as Ransom in Sardinia, Island of Crime and Unlawful Restraint, is a 1968 Italian poliziotteschi film directed by Gianfranco Mingozzi and starring Franco Nero, Charlotte Rampling and Frank Wolff.
Relevant evidence: No