text: One opera by this composer ends with the cello accompanying a character's hallucination, in which she is visited by her lover in a swan drawn chariot.
full_question: One opera by this composer ends with the cello accompanying a character's hallucination, in which she is visited by her lover in a swan drawn chariot. Another opera by him ends with Marcel having a vision of heaven accompanied by six harps on stage and a chorus of soldiers singing "God wants blood!" In that opera, a band of the title figures singing the rataplan interrupts the duel between Raoul and Saint-Bris. This composer's last opera ends with Sélika inhaling the blossoms of the manchineel tree and features a scene in which Nelusko sings the "Ballad of Adamastor." This man, who often collaborated with librettist Eugène Scribe, wrote an opera about Vasco da Gama, as well as an opera in which the marriage of Margaret of Valois presages the St. Bartholomew's Day Massacre. For 10 points, name this composer of grand operas, such as L'Africaine and The Huguenots.
first_sentence: One opera by this composer ends with the cello accompanying a character's hallucination, in which she is visited by her lover in a swan drawn chariot.
raw_answer: Giacomo Meyerbeer