107592
While many sites are rudimentary , extensive workings have been found which show evidence of skillful excavation , strongly implying the assistance of tin miners , doubtless the case in the recent example of extensive excavations discovered in 2008 when builders renovating a waterfront warehouse in Penzance took up hatch covers and found several tunnels , one extending some 300 yards and emerging into the cellar of an 18th - century public house after passing beneath several roads .
 Penzance
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:
 Penzance