Name the number of semifinals for tt2
CREATE TABLE table_18646111_13 (semifinals VARCHAR, class VARCHAR)
SELECT COUNT(semifinals) FROM table_18646111_13 WHERE class = "TT2"
### Context: CREATE TABLE table_18646111_13 (semifinals VARCHAR, class VARCHAR) ### Question: Name the number of semifinals for tt2 ### Answer: SELECT COUNT(semifinals) FROM table_18646111_13 WHERE class = "TT2"