The ATIS3 corpus includes over 774 scenarios completed by 137 subjects, yielding a total of over 7,300 utterances. All utterances are transcribed and 2,900 of them have been categorized and annotated with canonical reference answers. The relational database for this dataset included flight information for 46 cities and 52 airports. Data was collected at BBN, CMU, MIT and SRI, using their own ATIS systems and at NIST using systems provided by BBN and SRI. Two 1,000-utterance test sets were set aside from the data pooled by the collection sites. The 1st set was used in a December 1993 ARPA test and is included in ATIS3. The 2nd has been reserved for future testing.
