With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: The leaching of highly water soluble tannins from decaying vegetation and leaves along a stream may produce what is known as a blackwater river. Water flowing out of bogs has a characteristic brown color from dissolved peat tannins. The presence of large amounts of tannins (or humic acid) in well water can make it smell bad or taste bitter, and these effects can serve as a marker for other chemicals that often co-locate with humic acid and can render the water toxic for human consumption.
text_B: Given what we know about tannins in well water, should we also be concerned about high levels of tannins that can be found in red wine, after leaching into the undiluted juice from grape skins?
NO.