claim: The Stanford prison experiment was an investigation into the causes of difficulties between guards and prisoners.
evidence: Mahmud Shaterian -LRB- 1944 -- 2006 -RRB- was a famous Iranian Azerbaijani composer , musician and Tar master .. Iranian Azerbaijani. Iranian Azerbaijani. Tar. Tar ( lute ). Azerbaijani. Azerbaijani people. He was born in Ahrab district of Tabriz .. Tabriz. Tabriz. Ahrab. Ahrab. He had great role in surviving and preserving Azerbaijani music in Iran .. Azerbaijani. Azerbaijani people. Iran. Iran. He was also active in Radio and Television orchestra of Iran .. Iran. Iran