1624
About 1835 , Jerrard demonstrated that quintics can be solved by using ultraradicals ( also known as Bring radicals ) , the unique real root of 0 for real numbers .
 person: Jerrard
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: Jerrard