sentences:  On 17 September 1887, Nielsen played the violin in the Tivoli Concert Hall when his "Andante tranquillo e Scherzo" for strings was premiered.Shortly afterwards, on 25 January 1888, his String Quartet in F major was played at one of the private performances of the (Private Chamber Music Society).While Nielsen considered the Quartet in F to be his official debut as a professional composer, a far greater impression was made by his "Suite for Strings".