Nothing prior to May 7, 1915.
( Nothing ( ( prior ( to ( ( ( May 7 ) , ) 1915 ) ) ) . ) )
(ROOT (FRAG (NP (NN Nothing)) (ADVP (RB prior) (PP (TO to) (NP (NNP May) (CD 7) (, ,) (CD 1915)))) (. .)))
Everything is before May 7, 1915.
( Everything ( ( is ( before ( ( ( May 7 ) , ) 1915 ) ) ) . ) )
(ROOT (S (NP (NNP Everything)) (VP (VBZ is) (PP (IN before) (NP (NNP May) (CD 7) (, ,) (CD 1915)))) (. .)))