... trimming approach is that they have the poten-tial to drop arbitrary words from the original sen-tence without the need to consider the boundariesdetermined by the tree structures. This approach ... alternative to these tree trimmingapproaches, sequence-oriented approaches havebeen proposed (McDonald, 2006; Nomoto, 2007;Hori and Furui, 2003; Clarke and Lapata, 2006).Nomoto (2007) and ... Syntax-Free Approach to Japanese Sentence CompressionTsutomu HIRAO, Jun SUZUKI and Hideki ISOZAKINTT Communication Science Laboratories, NTT Corp.2-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0237...