How often does a train leave sealdah?
CREATE TABLE table_12095519_1 (frequency VARCHAR, origin VARCHAR)
SELECT frequency FROM table_12095519_1 WHERE origin = "Sealdah"
### Context: CREATE TABLE table_12095519_1 (frequency VARCHAR, origin VARCHAR) ### Question: How often does a train leave sealdah? ### Answer: SELECT frequency FROM table_12095519_1 WHERE origin = "Sealdah"