With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Although flatus possesses an odor, this may be abnormally increased in some patients and cause social distress to the patient. Increased odor of flatus presents a distinct clinical issue from other complaints related to intestinal gas. Some patients may exhibit over-sensitivity to bad flatus odor, and in extreme forms, olfactory reference syndrome may be diagnosed. Recent formally-funded research has found a correlation between flatus odor and both loudness and humidity content
text_B: Is it possible that the media sources reporting on this topic had been duped, and seriously mentioned informal research that in actuality might have just been some observations that were made at a fraternity Super Bowl party?
NO.