user: Question: Who is the incumbent for the Oregon 5 District that was elected in 1996?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Oregon 1', 'David Wu', 'Democratic', 1998.0, 'Re-elected']
SQL:

assistant: SELECT "Incumbent" FROM "Table" WHERE "First elected" = 1996.0 AND "District" = 'Oregon 5';