90998
The wrought iron invented by John Birkinshaw in 1820 replaced cast iron. Wrought iron ( usually simply referred to as " iron " ) was a ductile material that could undergo considerable deformation before breaking , making it more suitable for iron rails .
 John Birkinshaw
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 John Birkinshaw