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Find a Wikipedia image that answers this question: What color is the base of the Centaurea nigra?

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Represent the given Wikipedia image with related text information: Centaurea nigra-floro Centaurea nigra - Ploufragan-France june 2004 - flower Free Art License.

['<|image_1|>\nRepresent the given Wikipedia image with related text information: Coreopsis gladiata flwer plant petals Image title: Coreopsis gladiata Image from Public domain images website, http://www.public-domain-image.com/full-image/flora-plants-public-domain-images-pictures/flowers-public-domain-images-pictures/coreopsis-gladiata-flwer-plant-petals.jpg.html.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Georgia aster flowers. Credit Michele Elmore, The Nature Conservancy, Georgia. (13311614035).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Sedum stenopetalum0 Name Sedum stenopetalum Family Crassulaceae Image no. 1.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Coreopsis lanceolata Sterntaler.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Lithops julii 001 GotBot 2015 Lithops julii in Gothenburg botanical garden. Plant id: 2009-177 s G -- Bochum.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Calvatia excipuliformis, Mt. Mangart Calvatia excipuliformis from South slopes of Mt. Travnik, 2.200 m (7.218 feet), north part of Mt. Mangarts flats, East Julian Alps, Posocje, Slovenia EC on soil on steep stony slope with upland grass patches, calcareous rock, south oriented, with full sun and precipitations exposed, average precipitations 3.000 mm/year, average temperature 0-2 deg C, elevation 2.200 m (7.200 feet), alpine phytogeographical region.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Burnt-tip Orchid - Neotinea ustulata (13972348649).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Rosa nitida.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Prolećno cveće 3.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Buttercup (Ranunculus) 1  A Buttercup. Taken in Cartland Craigs, Lanark. Alternative ref: Cartland Craigs 20 June 2010 (136).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Dracunculus vulgaris LC0044 Dragon Arum (Dracunculus vulgaris), Thasos, Greece.\n']
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