... 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 ... systems often have to process megabytes ofdocuments. Parsers are still slow and users of on-827demand summarization systems are not prepared to wait for parsing to finish.3 A Syntax Free Sequence-orientedSentence ... evaluation,i.e., we presented the compressed sentences to sixhuman subjects and asked them to evaluate thesentence for fluency and importance on a scale 1(worst) to 5 (best). For each source sentence, theorder...