How many directors of episode 55?
CREATE TABLE table_25716397_1 (directed_by VARCHAR, series_no VARCHAR)
SELECT COUNT(directed_by) FROM table_25716397_1 WHERE series_no = 55
### Context: CREATE TABLE table_25716397_1 (directed_by VARCHAR, series_no VARCHAR) ### Question: How many directors of episode 55? ### Answer: SELECT COUNT(directed_by) FROM table_25716397_1 WHERE series_no = 55