His next play , " Carthaginians " , premiered in 1989 , was concerned with the Bloody Sunday events in Northern Ireland . In 1972 , in Derry , British soldiers shot unarmed civilians who were taking part in a march against internment , and killed 14 people . McGuinness has described Carthaginians as " My play on the Catholic imagination ... " , stating that " the key word in the play is the word ' perhaps ' " . It has been claimed that " Cartaginians " should be placed primarily " within a body of translations and adaptations of ancient Greek tragedy in the Irish theatre of the 1980s and 1990s "
Bloody Sunday events in Northern Ireland
Bloody Sunday (1972)
Frank McGuinness