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.

Input: Consider Input: Question: Does biofeedback-guided control of abdominothoracic muscular activity reduce regurgitation episodes in patients with rumination?
Answer: Rumination is produced by an unperceived somatic response to food ingestion that disrupts abdominal accommodation and can be effectively corrected by biofeedback-guided control of abdominothoracic muscular activity.

Output: yes

Input: Consider Input: Question: Do the Histologic Classifications of Lung Adenocarcinomas Are Discriminable by Unique Lineage Backgrounds?
Answer: For the first time, we showed the unique lineage backgrounds of different histologic subtypes and oncogenic mutations. Assessing this added parameter might be beneficial in discriminating intertumor heterogeneity, advancing target exploration, developing theranostic/prognostic biomarkers, and designing clinical trials.

Output: yes

Input: Consider Input: Question: Is cephalic index a useful sonographic marker for trisomy 21 and trisomy 18?
Answer: In this retrospective study, CI was not found to be statistically different between the study and control groups. Although a trend towards significance was seen with T21, this difference is not clinically useful. There may be interethnic differences in the CI between fetuses. CI is not useful for aneuploidy screening by ultrasound.
Output: no