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_45278 ( "Series Number" real, "Number of Episodes" real, "Original Air Date" real, "DVD Region 2 release date" text, "DVD Region 1 release date" text )

### Question ###
How many series originally aired before 1999 with more than 7 episodes and a DVD Region 1 release date of 16 april 2013?

### Accurate SQL ###

SELECT COUNT("Series Number") FROM table_45278 WHERE "Original Air Date" < '1999' AND "Number of Episodes" > '7' AND "DVD Region 1 release date" = '16 april 2013'