For 10 points, name these works composed for a group of two violins, a viola, and a cello.
Karlheinz Stockhausen composed one of these works that is meant to be played with each of the musicians in a helicopter. Mozart wrote nineteen of these, the last of which was nicknamed "Dissonance" for its unusually slow introduction. It's not a symphony, but one of these works that uses the pentatonic scale was composed in Spillville, Iowa by Antonin Dvorak. The "Erdody" and "Sun" examples of these were written by a composer sometimes called the "father" of this musical type, Josef Haydn. For 10 points, name these works composed for a group of two violins, a viola, and a cello.
Karlheinz Stockhausen composed one of these works that is meant to be played with each of the musicians in a helicopter.
string quartets