Please answer the following question: Generate a question that has the following answer: Fiorello for the following movie plot: Otis B. Driftwood (Groucho), business manager for wealthy dowager Mrs. Claypool (Margaret Dumont), has stood her up and is having dinner with another woman in the very same restaurant. When she discovers him seated directly behind her, Driftwood joins Mrs. Claypool, and introduces her to Herman Gottlieb (Sig Ruman), director of the New York Opera Company, also dining at the restaurant. Driftwood has arranged for Mrs. Claypool to invest $200,000 in the opera company, allowing Gottlieb to engage Rodolfo Lassparri (Walter Woolf King), the "greatest tenor since Caruso". Backstage at the opera house, chorister Ricardo Baroni (Allan Jones) hires his best friend Fiorello (Chico) to be his manager. Ricardo is in love with the soprano, Rosa Castaldi (Kitty Carlisle), who is also being courted by Lassparri. Driftwood arrives and finds Lassparri attacking his dresser, Tomasso (Harpo), who knocks Lassparri unconscious by hitting him over the head with a mallet. Fiorello appears and identifies himself as the manager of the "greatest tenor in the world". Driftwood, mistakenly thinking Fiorello is referring to Lassparri, signs Baroni to a contract. After bidding farewell to Rosa at the pier, Ricardo, Fiorello and Tomasso stowaway on board the ocean liner to New York inside Driftwood's trunk. After Driftwood discovers them, he tries to get the three of them to leave, as he is expecting a rendezvous with Mrs. Claypool. They refuse to go until they've eaten and eventually, Driftwood's incredibly small stateroom is crowded with an assortment of people. (see Stateroom scene below) Lassparri later spots the stowaways among the immigrants on the ship and they are caught and thrown into the brig. They escape with help from Driftwood and are able to sneak into the country by assuming the identities of three famous bearded aviators,[n 1] who are traveling aboard the ship. After a welcoming reception in New York, their true identities are discovered and they hide out in Driftwood's hotel room, pursued by police sergeant Henderson...
A:
Ricardo hires whom to be his manager?