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Find a Wikipedia image that answers this question: What is the man in Andrea del Castagno's painting "Famous Persons: Francesco Petrarca" holding?

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Represent the given Wikipedia image with related text information: Petrarch by Bargilla Famous Persons: Francesco Petrarca.

['<|image_1|>\nRepresent the given Wikipedia image with related text information: Annibale Carracci - Two Children Teasing a Cat - WGA4410.\n', "<|image_1|>\nRepresent the given Wikipedia image with related text information: Ambrosius Francken (I) - Christ's Entombment.\n", '<|image_1|>\nRepresent the given Wikipedia image with related text information: Montaigne-Dumonstier Portrait of Michel de Montaigne.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Holy Family with the Young Saint John the Baptist and an Angel, Girolamo da Carpi, Bologna, 1540s, oil on panel - Blanton Museum of Art - Austin, Texas - DSC07734 Holy Family with the Young Saint John the Baptist and an Angel.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Detail-miniature-artist-painting-portrait-q75-878x944.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Marco Ricci, and Sebastiano Ricci - Landscape with Classical Ruins and Figures - 70.PA.33 - J. Paul Getty Museum Landscape with Classical Ruins and Figures.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Visitación de Rafael.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Luca Signorelli - The Archangel Gabriel - Walters 37520 This image of the archangel Gabriel, which has suffered some damage, is most likely a fragment from a much larger painting of the Annunciation, which would have had the Virgin Mary on the right.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Bartolomeo Colleoni, statua equestre del Verrocchio, Venezia, campo di san Zanipolo.\n', "<|image_1|>\nRepresent the given Wikipedia image with related text information: Ercole de'Roberti - Saint Jerome in the Wilderness - Google Art Project.\n", '<|image_1|>\nRepresent the given Wikipedia image with related text information: Master of the Bartholomew Altarpiece-01.\n']
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