At the heart of the report was a survey of 1,622 third-year law students at 117 campuses in 40 states and the District of Columbia.
According to survey 1622 3rd year law students in 117 campuses in 40 states and DC 
mnli hypothesis: According to survey 1622 3rd year law students in 117 campuses in 40 states and DC  premise: At the heart of the report was a survey of 1,622 third-year law students at 117 campuses in 40 states and the District of Columbia.