1. Copy the famous pictures in museums.
2. Copy the famous pictures of museums.
3. In museums, copy the famous pictures.
(Does #1 mean #2 or #3? Is "in museums" an adjective phrase or an adverbial phrase? Thank you.)
#1 means to copy the pictures that are hanging inside the museums.
#2 means to copy some photographs of famous museums. (what they look like from the outside)
"in museums" is an adjective phrase, modifying "pictures"