What season ended on April 18?
CREATE TABLE table_22383603_1 (season VARCHAR, finish__incl_championship_ VARCHAR)
SELECT season FROM table_22383603_1 WHERE finish__incl_championship_ = "April 18"
### Context: CREATE TABLE table_22383603_1 (season VARCHAR, finish__incl_championship_ VARCHAR) ### Question: What season ended on April 18? ### Answer: SELECT season FROM table_22383603_1 WHERE finish__incl_championship_ = "April 18"