This representation treats clitics as separate tokens and abstracts the orthographic rewrites they undergo when cliticized . See the handling of the l/PREP+Al/DET in word # 6 in Table 5 . This representation is used by the LDC in the Penn Arabic Treebank ( PATB ) ( Maamouri et al. , 2004 ) and tools such as MADAMIRA ( Pasha et al. ,