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_46311 ( "from" text, "aircraft" text, "carrier" text, "air wing" text, "tail code" text, "area" text )

### Question ###
Which carrier was deployed on 18 July 1968?

### Accurate SQL ###

SELECT "carrier" FROM table_46311 WHERE "from" = '18 july 1968'