With no explanation, label text_A→text_B with either "no" or "yes".
text_A: For infants with nonsmoking mothers and low infant birth weight, the probability of high infant mortality is 40%. For infants with nonsmoking mothers and normal infant birth weight, the probability of high infant mortality is 67%. For infants with smoking mothers and low infant birth weight, the probability of high infant mortality is 13%. For infants with smoking mothers and normal infant birth weight, the probability of high infant mortality is 42%. For infants with nonsmoking mothers and with poor health, the probability of normal infant birth weight is 52%. For infants with nonsmoking mothers and with good health, the probability of normal infant birth weight is 11%. For infants with smoking mothers and with poor health, the probability of normal infant birth weight is 73%. For infants with smoking mothers and with good health, the probability of normal infant birth weight is 44%. The overall probability of good health is 19%.
text_B: Does maternal smoking status positively affect infant mortality through infant's birth weight?
yes.