(S (S (NP (BASENP (NNP Harper)) (PRN (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBZ is) (VP (ADVP (RB currently)) (VP (VBG writing) (NP (BASENP (DT a) (NN book)) (PP (IN about) (NP (BASENP (DT the) (NN history)) (PP (IN of) (BASENP (NN Hockey))))))))))) (COMMA ,))) (VP (VBD admitted) (SBAR (S (BASENP (PRP he)) (VP (VBZ 's) (BASENP (DT a) (NN curling) (NN fan))))))) (PERIOD .))