Cinema of Argentina because harassment led to the exile of a number of prominent actors, among them Alberto de Mendoza, Arturo García Buhr, Niní Marshall and Libertad Lamarque, whose rivalry with her colleague Eva Duarte turned against her when the latter became First Lady in 1946. Argentine cinema began losing viewership as foreign titles gained an increasing foothold in the Argentine market. The problem eventually became so bad that Argentina tried to curb the influx with the Cinema Law of 1957, establishing the "Instituto Nacional de Cinematografía" to provide education and funding. Among the era's most successful films were: "Historia de una noche,"
First Lady of Colombia (ICBF); Article 58 stated that ""The Presidency of the Institute shall be exercised by the wife of the President..."". This was the first instance that legal responsibility was granted to the Office of the First Lady on a permanent basis. This was later modified by Article 25 of "Law 7 of 1979" that changed the role of the First Lady in the ICBF: ""The board of directors will be presided by the spouse of the President"". This resolved a conflict of authority between the similar offices of President (until then the First Lady) and the General Director; also of note