Imagine that in 1987, within an effort to estimate the extent of tax revenues lost or delayed from the failure of businesses to file returns, the General Accounting Office examined revenue shortfalls to individual states.
The GAO is the General Accounting Office, and made an effort in 1987 to estimate tax revenues lost.
mnli hypothesis: The GAO is the General Accounting Office, and made an effort in 1987 to estimate tax revenues lost. premise: Imagine that in 1987, within an effort to estimate the extent of tax revenues lost or delayed from the failure of businesses to file returns, the General Accounting Office examined revenue shortfalls to individual states.