50018
At extremely rare intervals the thermometer has fallen below zero ( - 18 " °C ) , as was the case in the remarkable cold wave of the 12th - 13 February 1899 , when an absolute minimum of was registered at Valley Head .
 Valley Head
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:
 Valley Head