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: Is cerebral acetylcholinesterase activity decreased in MS patients with cognitive impairment?
Answer: In the patient group regional AChE activities had inverse correlations with Word learning and MMSE (Mini-Mental State Examination) scores. In the group of cognitively deteriorated MS patients no change in cerebral AChE activity, compared with controls, was observed, but within the patient group more pronounced cognitive symptoms were associated with higher cerebral AChE activity.
[EX A]: no

[EX Q]: Question: Does global transcriptional analysis suggest Lasiodiplodia theobromae pathogenicity factors involved in modulation of grapevine defensive response?
Answer: L. theobromae transcriptome was established and validated. Its usefulness was demonstrated through the identification of genes expressed during the infection process. Our results support the hypothesis that heat stress facilitates fungal colonization, because of the fungus ability to use the phenylpropanoid precursors and SA, both compounds known to control host defense.
[EX A]: yes

[EX Q]: Question: Is stromal transforming growth factor-beta 1 crucial for reinforcing the invasive potential of low invasive cancer?
Answer: Stromal TGF-β1 signalling promoted PDPN expression in cancer cells, thereby enhancing tumour growth and leading to a more invasive phenotype.
[EX A]:
yes