With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Most birds found in the Marshall Islands, with the exception of those few introduced by man, are either sea birds or a migratory species. There are about 70 species of birds, including 31 seabirds. 15 of these species actually nest locally. Sea birds include the black noddy and the white tern. The only land bird is the house sparrow, introduced by humans.
text_B: If you spend a lot of time on the Marshall Islands and see a species of bird more in one part of the year than another, is it likely that bird is a sea bird?
DON'T KNOW.