Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.

[EX Q]: Question: Do infant and young child feeding practices differ by ethnicity of Vietnamese mothers?
Answer: Breastfeeding practices were suboptimal and differed by ethnicity, which suggests need for tailored interventions at multiple levels to address ethnic-specific challenges and norms. Complementary feeding practices were less optimal among ethnic minorities compared to Kinh, which suggests need for broad intervention including improved food availability, accessibility, and security.
[EX A]: yes

[EX Q]: Question: Is time point important for effects of syngeneic bone marrow transplantation for type 1 diabetes in mice?
Answer: These results indicated that syn-BMT should be performed, when diabetes is neither too new-onset nor too late-stage. Tregs represent one mechanism for syn-BMT-induced restoration of immune tolerance in STZ-diabetic mice.
[EX A]: yes

[EX Q]: Question: Do phosphorus application and elevated CO2 enhance drought tolerance in field pea grown in a phosphorus-deficient vertisol?
Answer: Phosphorus application and eCO2 interactively enhanced periodic drought tolerance in field pea as a result of decreased stomatal conductance, deeper rooting and high Pi availability for carbon assimilation in leaves.
[EX A]:
yes