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.

Question: Is pTEN loss associated with a poor response to trastuzumab in HER2-overexpressing gastroesophageal adenocarcinoma?
Answer: PTEN loss was frequently found in HER2-overexpressing tumors, and was associated with a poor response to trastuzumab-based therapy in patients with GEA.
yes