Question: Who was the leader of the group of five prominent 19th century composers that Alexander Borodin was a part of?
Sentence (from "Alexander Borodin"): Alexander Porfiryevich Borodin (Russian: Алекса́ндр Порфи́рьевич Бороди́н ; ] , 12 November 183327 February 1887) was a Russian Romantic composer of Georgian origin, as well as a doctor and chemist.
Relevant evidence: No