00293nam a2200109 a 450000500170000002000150001708200200003210000170005224500530006926000420012230000190016420251203092006.0  a0805303340  a006.35,bD, all  aAllen, James  aNatural language understanding, James Allen, eng  aNew York, Benjamin/Cummings, Usc1994  axv,654p.c22cm