to the group in fleas , <apostrophe><apostrophe>
(ROOT_0 (S_0 (ATS_2 (PP_2 (TO_0 to) (NP_3 (NP_5 (DT_0 the) (NN_2 group)) (PP_0 (IN_1 in) (NP_4 (NNS_1 fleas))))) (COMMA_0 ,)) (APOSTROPHE_0 <apostrophe><apostrophe>)))