Consider the following treebank of bracketed parse trees: (S (VP (VB define)(NN cosmology))(E .)) (S (VP (VB define)(NNP thalassemia))(E .)) (S (VP (VB name)(NP (DT a)(NN stimulant)))(E .)) (S (SBARQ (WHNP (WP what))(SQ (VBP are)(NP (NNPS amphibians)))(E ?)) ) (S (SBARQ (WHNP (WP what))(SQ (VBP are)(NP (NNS antacids)))(E ?)) )