Problem: Does "However, an examination of mammalian teeth suggests that it is the open, gritty habitat and not the grass itself which is linked to diet changes in mammals, giving rise to the "grit, not grass" hypothesis." answer the question "what diet did the mammals switch to from browsing diets?"

A: no

Problem: Does "One of the most famous works of Chinese literature, A Dream of Red Mansions by Cao Xueqin (17151763), was about the lives of noble women who passed their lives out of public sight within the walls of such mansions." answer the question "who wrote A dream of Red Mansions?"

A: yes

Problem: Does "Congress often writes legislation to restrain executive officials to the performance of their duties, as laid out by the laws Congress passes." answer the question "To what does congress attempt to limit executive officials?"

A:
yes