During the act, Playing on Glasses, what was the semi-final?
CREATE TABLE table_23429629_4 (semi_final VARCHAR, act VARCHAR)
SELECT semi_final FROM table_23429629_4 WHERE act = "Playing on Glasses"
### Context: CREATE TABLE table_23429629_4 (semi_final VARCHAR, act VARCHAR) ### Question: During the act, Playing on Glasses, what was the semi-final? ### Answer: SELECT semi_final FROM table_23429629_4 WHERE act = "Playing on Glasses"