Because the paper did not say that.
( ( Because ( ( the paper ) ( did not ) ) ) ( ( say that ) . ) )
(ROOT (S (SBAR (IN Because) (S (NP (DT the) (NN paper)) (VP (VBD did) (RB not)))) (VP (VBP say) (NP (DT that))) (. .)))
The paper said so.
( ( The paper ) ( ( said so ) . ) )
(ROOT (S (NP (DT The) (NN paper)) (VP (VBD said) (ADVP (RB so))) (. .)))