Two such hints, however, have only a few possible answers in common, so that the solver can concentrate on them and pick the most probable one.
( ( Two ( such hints ) ) ( , ( however ( , ( ( ( ( have ( ( ( only ( a few ) ) ( possible answers ) ) ( in common ) ) ) , ) ( so ( that ( ( the solver ) ( can ( ( ( concentrate ( on them ) ) and ) ( pick ( the ( ( most probable ) one ) ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (CD Two) (JJ such) (NNS hints)) (, ,) (ADVP (RB however)) (, ,) (VP (VBP have) (NP (NP (QP (RB only) (DT a) (JJ few)) (JJ possible) (NNS answers)) (PP (IN in) (NP (JJ common)))) (, ,) (SBAR (RB so) (IN that) (S (NP (DT the) (NN solver)) (VP (MD can) (VP (VP (VB concentrate) (PP (IN on) (NP (PRP them)))) (CC and) (VP (VB pick) (NP (DT the) (ADJP (RBS most) (JJ probable)) (NN one)))))))) (. .)))
There are only a few possible answers.
( There ( ( are ( ( only ( a few ) ) ( possible answers ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (QP (RB only) (DT a) (JJ few)) (JJ possible) (NNS answers))) (. .)))