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: Question: Do quantitative EEG markers relate to Alzheimer 's disease severity in the Prospective Dementia Registry Austria ( PRODEM )?
Answer: Selected QEEG markers show strong associations with AD severity. Both cognitive and resting state should be used for QEEG assessments.

Answer: yes


Question: Question: Is early systemic sclerosis : serum profiling of factors involved in endothelial , T-cell , and fibroblast interplay marked by elevated interleukin-33 levels?
Answer: Our study suggests that an endothelial, T-cell and fibroblast activation can be present in patients with early SSc and it is associated with a distinct profile of circulating factors involved in the cross-talk of these cells. The marked increase of IL-33 in early SSc patients suggests new routes of investigation of cell-cell dynamics in target tissues predating overt disease manifestations, thus opening to new therapeutic approaches.

Answer: yes


Question: Question: Is seropositivity to multiple sexually transmitted infections common?
Answer: Seropositivity to multiple STIs is not common. This fits the concept of different transmission probabilities and the spread of the STIs, and suggests that seropositivity alone should be used with caution as a surrogate to sexual behavior in women.

Answer:
no