Based on the clue 'a value below which 50 of subjects fall or a strip...', what is the answer?

Based on the clue 'a valetudinarian is constantly morbidly concerned...', what is the answer? Based on the clue 'a valley at 282 feet below sea level in this state...', what is the answer? Based on the clue 'a valley formed by the cuyahoga river divides this...', what is the answer? Based on the clue 'a valley in nova scotia as well as the capital of ...', what is the answer? Based on the clue 'a vampire series by kerrelyn sparks is punningly t...', what is the answer? Based on the clue 'a vampire takes over the title hamlet in this king...', what is the answer? Based on the clue 'a vampire will probably never bite you in the apse...', what is the answer? Based on the clue 'a van morrison tune says well its a marvelous nigh...', what is the answer?