The last set of cross sectional data filed with the Postal Rate Commission in 1989 consisted of a sample of 16,092 different routes.
The Postal Rate Commision spent a few months during 1989 filling the last set of cross sectional data.
mnli hypothesis: The Postal Rate Commision spent a few months during 1989 filling the last set of cross sectional data. premise: The last set of cross sectional data filed with the Postal Rate Commission in 1989 consisted of a sample of 16,092 different routes.