(S (S (S (PP (IN At) (BASENP (DT the) (JJ present) (NN time))) (COMMA ,) (S (BASENP (DT the) (JJ Japanese) (JJ imperial) (NN household)) (VP (VBZ has) (NP (BASENP (DT no) (JJ male) (NN member)) (PP (IN under) (NP (BASENP (DT the) (NN age)) (PP (IN of) (BASENP (NN 20))))))))) (COLON ;) (S (BASENP (JJ present) (NN law)) (VP (ADVP (RB only)) (VP (VBZ allows) (S (BASENP (JJ male) (NNS descendants)) (VP (TO to) (VP (VB ascend) (PP (TO to) (BASENP (DT the) (NNP Chrysanthemum) (NNP Throne)))))))))) (PERIOD .))