Clearly, yes.
( Clearly ( , ( yes . ) ) )
(ROOT (FRAG (ADVP (RB Clearly)) (, ,) (NP (RB yes)) (. .)))
Obviously, the answer is yes. 
( Obviously ( , ( ( the answer ) ( ( is yes ) . ) ) ) )
(ROOT (S (ADVP (RB Obviously)) (, ,) (NP (DT the) (NN answer)) (VP (VBZ is) (NP (UH yes))) (. .)))