What do children owe elderly parents?
D000328:Adult; D000368:Aged; D003858:Dependency, Psychological; D005190:Family; D005260:Female; D005382:Financing, Personal / Q000331:legislation & jurisprudence; D006801:Humans; D008297:Male; D009014:Morals; D012919:Social Behavior; D012940:Social Problems; D014481:United States