Example 1
Since the border got opened, a lot of people have been to Japan for sightseeing. However, tourists who are traveling in the country mainly stay in the capital city.
Example 2
Since the border got opened, a lot of people have been to Japan for sightseeing. However, in Japan, tourists mainly stay in the capital city.
Example 3
Since the border got opened, a lot of people have been to Japan for sightseeing. However, tourists mainly stay in the capital city.
If we already have the context, can we simplify Example 1 to Example 3?
If we already have the context, can we simplify Example 2 to Example 3?
If yes, then does that mean that in Example 3, the relative clause [who are traveling in the country] is implied, and Example 3 can also imply the phrase "in Japan"?
How do we explain this phenomenon? Does context just allow us to understand the intended meaning?
Can we say this is the economics of language?