... 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 ... 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 ... offers only moderatecompression rates.An alternative to the tree trimming approach is the sequence-oriented approach (McDonald,2006; Nomoto, 2007; Clarke and Lapata, 2006;Hori and Furui, 2003)....