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.
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Question: Question: Is tumor differentiation a risk factor for lymph node metastasis in elderly patients with early gastric cancer?
Answer: Elderly patients with undifferentiated type histology early gastric cancer without other risk factors for lymph node metastasis may be candidates for endoscopic resection.

Answer: no


Question: Question: Do changes in basophil activation during grass-pollen sublingual immunotherapy correlate with clinical efficacy?
Answer: Allergen reactivity of peripheral blood basophils is not a biomarker for adverse events or early onset of clinical responses to SLIT.

Answer: no


Question: Question: Is efficacy and safety of sorafenib in patients with advanced hepatocellular carcinoma : age a problem?
Answer: Elderly patients with advanced HCC, when treated with sorafenib, have an equivalent clinical outcome with similar toxicity rates as their younger counterparts. Age alone should not be a discriminating factor for the management of advanced HCC with sorafenib.

Answer:
no