Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2263152_1 ( distribution_mechanism VARCHAR, version VARCHAR )

### Question ###
If the version is 1.5b, what is the distribution mechanism?

### Accurate SQL ###

SELECT distribution_mechanism FROM table_2263152_1 WHERE version = "1.5b"