Task: Question Answering
Input (English): Passage: In seventeenth-century Paris, poet and supreme swordsman Cyrano de Bergerac stops a play from being shown because he ostensibly cannot stand the bombastic style of the principal actor, Montfleury. An annoyed aristocratic fop, the Vicomte de Valvert, provokes him into a duel by tritely insulting Cyrano's enormous nose. Cyrano first mocks his lack of wit, improvising numerous inventive ways in which Valvert could have phrased it (much to the amusement of the audience). He then composes a ballade for the occasion on the spot and recites it during the sword fight. With the last line, he stabs his opponent.
Cyrano's friend Le Bret, Captain of the Gascony guards, warns him he has made powerful enemies of his victim's friends, but he is unconcerned. When Le Bret presses him to reveal the real reason he hates Montfleury, Cyrano admits that he became jealous when he saw the actor smiling at his beautiful cousin Roxane. He confesses that he is in love with her, but harbors no hope of it being returned because of his nose. When he receives a request from Roxane to see her in the morning, he is finally emboldened to act.
Then pastry chef and fellow poet Ragueneau approaches him for help. Ragueneau has learned that a nobleman he had mocked with his verses, the Comte De Guiche, has hired a hundred ruffians to teach him a lesson. Cyrano escorts him, kills eight of the horde, and drives off the rest.
The next day, before he can tell Roxane of his feelings, she informs him that she has fallen in love with a handsome guardsman, Christian de Neuvillette, though she has not even spoken to him. Cyrano hides his devastation and agrees to help her. 
Question: What is the full name of the man that the supreme swordsman stabs while singing?
Output (English): Vicomte de Valvert.