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The mechanism by which its pairs of pollinia attach themselves to an insect 's proboscis was discovered by Charles Darwin and described in his book on the " Fertilisation of Orchids " .
 person: Charles Darwin; media: Fertilisation of Orchids
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Charles Darwin; media: Fertilisation of Orchids