20935
The existing bridge dates from 1789 to 1790 and was designed by the bridge engineer and architect , Thomas Harrison of Lancaster .
 Thomas Harrison, Lancaster
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:
 Thomas Harrison, Lancaster