With no explanation, label text_A→text_B with either "no" or "yes".
text_A: For people who do not have a brother, the probability of smallpox survival is 39%. For people who have a brother, the probability of smallpox survival is 46%.
text_B: For people who have a brother, would it be less likely to see smallpox survival if the person did not have a brother?
yes.