2593
In 1952 , Geoffrey Colin Shephard generalized the idea of polygons to the complex plane , where each real dimension is accompanied by an imaginary one , to create complex polygons .
 person: Geoffrey Colin Shephard
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: Geoffrey Colin Shephard