Sentence:  In fact both episodes represent the recognition of the heroine, the difference being a large detailed <WSD>monoscene</WSD> in Tchaikovsky's opera and the presence of Mariya Kondratyevna and Alyosha besides the main heroine in piece No. 10 in Smelkov's opera. 
Meaning of the word marked with <WSD> tags:  A performance or piece of art occurring within a single setting.