301471
In 1863 in Rome , he exhibited : The Roman Lowlands ; Il temporale in mare , and The North Sea ; as well as some twelve other painted outdoors , including Un bosco di guerci negli Appennini romani and The Arch of Septimus Severus in the Roman Forum .
 Rome
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rome