In this paper we introduce a naive algorithm for nondeterminisctic LTAG derivation tree extrac-tion from the Penn Treebank and the Proposi-tion Bank. This algorithm is used in the EM models of LTAG Treebank Induction reported in (Shen and Joshi, 2004). Given the trees in the Penn Treebank with PropBank tags, this algorithm generates shared structures that al-low efficient dynamic programming in the EM models. 1