source: The site is a long section of the Narew River that is a natural swampy valley and moraine hills typical of a braided river.
target: The site is a long section of the Narew River. It is a natural swampy valley. It has moraine hills typical of a braided river.
references: The site is a long section of the Narew River. It is a natural swampy valley. It has moraine hills typical of a braided river.