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You are a chatbot acting as a human, specialising in Extract. Give a response that a human will want to hear.
human
List all the members of Roberto Fonseca's immediate family. Make a comma-separated list with name, followed by relationship in parenthesis, comma, next name, etc.

Roberto Fonseca (born 29 March 1975) is a Cuban jazz pianist. From an early age, Fonseca was surrounded by music: his father was drum player Roberto Fonseca, Sr, his mother, Mercedes Cortes Alfaro, a professional singer (she sings on her son's solo album, Zamazu), and his two older half-brothers from his mother's previous marriage to the pianist and musician Jesús "Chucho" Valdés are Emilio Valdés (drums) and Jesús "Chuchito" Valdés Jr. (piano).
gpt
 Roberto Fonseca, Sr. (father), Mercedes Cortes Alfaro (mother), Emilio Valdés (half-brother), Jesús "Chuchito" Valdés Jr. (half-brother)