CREATE TABLE table_name_49 (crimean_war INTEGER, second_afghan_war VARCHAR(255), school VARCHAR(255))
What is the average Crimean War with a Second Afghan War totaling 1, and a School of hamblin and porter's school, cork?
    
SQL: SELECT AVG(crimean_war) FROM table_name_49 WHERE second_afghan_war = "1" AND school = "hamblin and porter's school, cork"