The O the NONE tree B-SLOT0 tree http://www.cs.wisc.edu/zhu/space2/ttp3_new/images/not_available.gif 's I-SLOT0 's http://www.cs.wisc.edu/zhu/space2/ttp3_new/images/not_available.gif branches I-SLOT0 branch http://www.cs.wisc.edu/zhu/space2/ttp3_new/images/not_available.gif have B-VERB have http://www.cs.wisc.edu/zhu/space2/ttp3_new/images/not_available.gif many O many NONE leaves B-SLOT1 leaf http://www.cs.wisc.edu/zhu/space2/ttp3_new/images/not_available.gif on O on NONE them O them NONE . O . NONE