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_71320 ( "School" text, "Location" text, "Total" real, "Crimean War" real, "Persian War" real, "Indian Mutiny" real, "1860-1878" real, "Zulu War" real, "Second Afghan War" text )

### Question ###
What is the average Crimean War with a Second Afghan War totaling 1, and a School of hamblin and porter's school, cork?

### Accurate SQL ###

SELECT AVG("Crimean War") FROM table_71320 WHERE "Second Afghan War" = '1' AND "School" = 'hamblin and porter''s school, cork'