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_name_19 ( specific_impulse__s_ VARCHAR, scenario VARCHAR )

### Question ###
What is the specific impulse for the engine with a scenario of sr-71 at mach 3.2 (wet)?

### Accurate SQL ###

SELECT specific_impulse__s_ FROM table_name_19 WHERE scenario = "sr-71 at mach 3.2 (wet)"