Does the sentence "Seven bear skulls from the cave may have been buried by the same prehistoric people." provide a valid answer to the question "People blindfolded themselves to cross what?"

A: no

Does the sentence "In a survey in a northeastern U.S. university of college students who identified as "white", about 30% were estimated to have up to 10% African ancestry." provide a valid answer to the question "What percentage of African ancestry were 30% of college students identifying as white estimated to have?"

A: yes

Does the sentence "Oral corticosteroids began to be used for this condition in the 1950s while inhaled corticosteroids and selective short acting beta agonist came into wide use in the 1960s." provide a valid answer to the question "When did inhaled corticosteroids and short acting beta agonist start being used?"

A: yes

Does the sentence "The Yiddish linguist Max Weinreich published the expression, A shprakh iz a dialekt mit an armey un flot (" ":" provide a valid answer to the question "What does "A shprakh iz a dialekt mit an armey un flot" mean in English?"

A:
no