user: Question: Which Round has a College of appalachian state, and an Overall smaller than 156?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 6.0, 6.0, 'Spec Sanders', 'HB', 'Texas']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "College" = 'appalachian state' AND "Overall" < 156.0;