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)))))))) (. .)))
Without hints, it would be too difficult for the problems to be solved.
( ( Without hints ) ( , ( it ( ( would ( ( be ( too ( difficult ( for ( the problems ) ) ) ) ) ( to ( be solved ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Without) (NP (NNS hints))) (, ,) (NP (PRP it)) (VP (MD would) (VP (VB be) (ADJP (RB too) (JJ difficult) (PP (IN for) (NP (DT the) (NNS problems)))) (S (VP (TO to) (VP (VB be) (VP (VBN solved))))))) (. .)))