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_42884 ( "Table 2: Depression Data" text, "1929" real, "1931" real, "1933" real, "1937" real, "1938" real, "1940" real )

### Question ###
What is the average 1940 value where 1929 values are 101.4 and 1933 values are over 68.3?

### Accurate SQL ###

SELECT AVG("1940") FROM table_42884 WHERE "1929" = '101.4' AND "1933" > '68.3'