What is the last number in season of the episodes written by Dan Vebber?
CREATE TABLE table_28194879_1 (_number INTEGER, written_by VARCHAR)
SELECT MAX(_number) FROM table_28194879_1 WHERE written_by = "Dan Vebber"
### Context: CREATE TABLE table_28194879_1 (_number INTEGER, written_by VARCHAR) ### Question: What is the last number in season of the episodes written by Dan Vebber? ### Answer: SELECT MAX(_number) FROM table_28194879_1 WHERE written_by = "Dan Vebber"