Does the sentence "The 2008 Research Assessment Exercise returned 26% of the 1225 staff submitted as being world-leading (4*) and a further 47% as being internationally excellent (3*)." provide a valid answer to the question "What percentage of Imperial's staff was classified as world leading in 2008?"

A: yes

Does the sentence "Holonyak first reported his LED in the journal Applied Physics Letters on the December 1, 1962." provide a valid answer to the question "What graduate student of Holonyak created the yellow LED?"

A: no

Does the sentence "New research, however, argues that this cannot be correct, as dividing sovereignty - when this concept is properly understood in its core meaning of the final and absolute source of political authority in a political community - is not possible." provide a valid answer to the question "New research has clarified that Federalism has how many distinct forms?"

A: no

Does the sentence "They cite in support of this argument research published in 1973 that found that treating Shigella with the anti-diarrhea drug (Co-phenotrope, Lomotil) caused people to stay feverish twice as long as those not so treated." provide a valid answer to the question "If diarrhea is stopped, would could happen?"

A:
no