Assertion: laughter's effect | /r/HasProperty | immediate symptom-relieving
Facets:
Source sentences:
text: In 1989, the Journal of the American Medical Association published an article, wherein the author wrote that "a humor therapy program can increase the quality of life for patients with chronic problems and that laughter has an immediate symptom-relieving effect for these patients, an effect that is potentiated when laughter is induced regularly over a period".